-ar

(Latin: a suffix; pertaining to, of the nature of, like; denoting an agent)

register, register, registrar
register (REJ i stuhr) (noun)
1. A written book or system of public records and information: The election register was kept in a locked safe when the office was closed.
2. The vocal range of a singer’s voice or that of an instrument: The register of the singer's voice of three octaves was amazing.
register (REJ i stuhr) (verb)
1. Formally to sign up for or to enroll for something: When Manfred stayed at the hotel, he had to register at the front desk before he could get a key to the room.

Christine plans to register for three lecture courses this summer.

2. To suggest or to convey an impression: Ronda Smith's name did not at first register with Karl and he was embarrassed when he realized that she was one of his former teachers.

Mike's drama teacher taught him how to register "surprise" in his face.

registrar (REJ i strahr", rej" i STRAHR) (noun)
An official of an institution (educational, medical, corporate, etc.) who is responsible for maintaining records, processing paper work for admissions, etc.: The registrar at the front desk knew the answer to Mabel's question regarding whether her application for admission to the college had been accepted.

The office of the registrar was located in the same building as the president of the university.

The registrar at the university helped Silvia to register for the classes that she wanted to take next year.

regular
secular
1. Worldly rather than spiritual.
2. Not specifically relating to religion or to a religious body: "They were playing secular music instead of sacred hymns."
3. Relating to or advocating secularism.
4. Not bound by monastic restrictions; especially, not belonging to a religious order (a reference to the clergy).
5. Occurring or observed once in an age or century.
6. Lasting from century to century.
7. Etymology: it was used in early Christian texts for the "temporal world"; as opposed to the "spiritual world"; and that was the sense in which its derived adjective Latin saecularis passed via Old French seculer into English.

The more familiar modern English "non-religious" meaning came into the language at about the 16th century.

seminar
similar (adjective), more similar, most similar
1. The sharing of some qualities, but which are not identical: "They had similar experiences growing up, even though the came from completely different backgrounds."
2. Related in appearance or nature and although they are alike, they are not identical: "Their cats are similar in size and color."
3. In mathematics, a reference to elements with the same shape or angles; such as, geometric figures that differ in size or proportion but not in shape or angular measurements.
solar
1. Relating to or derived from the sun or utilizing the energies of the sun.
2. Referring to, or proceeding from the sun; such as, "solar rays" and "solar physics".
3. Using or operated by energy derived from the sun; including "a solar heating system".
4. Determined or measured in reference to the sun, as the "solar year".
5. Describing any renewable form of energy that does not create greenhouse gas emissions or nondegradable toxic wastes.
sonar
1. A system which uses underwater sound waves to determine the location of objects and for navigation and communications.
2. Acronym for sound navigation and ranging.
stelar
A reference to stele or steles.
stellar
tendrillar
Acting as a tendril; twining.
trochlear
In anatomy, relating to a trochlea, or to any other pulley-shaped part or structure.
unilobar
1. Having only one lobe.
2. Consisting of a single lobe.
unipolar
vinegar (s) (noun), vinegars (pl)
1. A sour-tasting liquid produced usually by oxidation of the alcohol in wine or cider and used as a condiment or food preservative: Vinegar can be made by certain bacteria operating on sugar-water solutions directly, without intermediary conversion to ethanol.

2. A sour liquid consisting of dilute and impure acetic acid, obtained by acetous fermentation from wine, cider, beer, ale, etc.; used as a condiment, preservative, etc.: Vinegar is a sour-tasting liquid made from the oxidation of ethanol in wine, cider, beer, fermented fruit juice, or nearly any other liquid containing alcohol.
3. In pharmacy, a solution of a medicinal substance in dilute acetic acid, or vinegar.
4. A descriptive term: sour or irritable speech, manner, or countenance: The audience recognized a note of vinegar in speaker's voice.
5. Informal reference: vigor; high spirits; vim.
6. Etymology: a word that comes from Old French vinaigre, meaning "sour wine"; based on Latin vinum, "wine" + acer, "sour".
vulgar (adjective), more vulgar, most vulgar
1. Relating to something that is crude or obscene; such as, vulgar language or behavior.
2. Conveying a lack of taste or reasonable moderation; indecent; obscene; lewd.
3. Descriptive of someone who is lacking in courtesy and manners; crude; coarse; unrefined.
4. Pertaining to a form of a language spoken generally by people.
5. Characteristic of being without distinction, aesthetic value, or charm; banal; ordinary.
6. Etymology: "common, ordinary", from Latin vulgaris, "of or pertaining to the common people, common" from vulgus, "the common people, multitude, crowd, throng" as opposed to those "who were considered educated, well behaved, had control over their language and conduct, and who had higher levels of good manners and politeness when dealing with other people".