-al; -ial, -eal

(Latin: suffix; pertaining to, like, of the kind of, relating to, characterized by, belonging to; action of, process of)

peritracheal (adjective) (not comparable)
Regarding something that surrounds the tracheae: Rings of peritracheal hyaline cartilage are situated around the trachea.
phalangeal (adjective) (not comparable)
Pertaining to a phalanx or phalanges: One of the phalangeal digits of Judy's right hand broke when the door accidentally shut while fingers were still between the door and the frame.
pharyngeal (noun) (not comparable)
Relating to the pharynx: Dr. Martin said that Greg had a pharyngeal infection which affected his alimentary canal right behind his mouth which caused him such pain.
phosphoreal (adjective) (not comparable)
Outdated, of or pertaining to phosphorus; resembling phosphorus: The phosphoreal chemical element, which is poisonous and yellowish-white in color, produces a glow and, when it comes in contact with air, it burns! ,
portrayal (s) (noun), portrayals (pl)
A representation of somebody presented as a dramatic character; a drawing, painting, or a photograph of a person or an object: The main actor played a perfect portrayal of the nasty and pessimistic old man in the theatrical production in school .
prelacteal (adjective) (not comparable)
1. Regarding the consumption of nourishment that precedes the beginning of milk flow: Prelacteal feeding of a newborn baby with carbohydrate-electrolyte solutions is to reduce initial weight loss until breast feeding is fully established.
2. Pertaining to the jaw structures of marsupials prior to milk teeth: In her biology class at school, Nancy learned about the prelacteal mouth formation of kangaroos, wombats, and opossums in Australia that were thought to be traces of dentition before the first teeth appeared.
prenatal (adjective) (not comparable)
Concerning the preparations a pregnant woman or her unborn baby might need: Lucy Timmons decided to attend a prenatal yoga class each evening in advance of giving birth.

Lucy's friend wanted to take prenatal vitamins to make sure she was getting the best nutrition for her new baby.

principal (s) (noun), principals (pl)
1. The head or director of a school or of a college in England: Mr. Straight wa the principal at the elementary school that Virginia attended.
2. A person who takes a leading part in any activity, as a play; a chief actor or performer: Since Mary was the principal in the play at school, she had to take part in all of the rehearsals each afternoon.
3. The first player of a division of instruments in an orchestra (except the concertmaster): The principals of each string section in a chamber orchestra always sits in the first row of players.
4. Something of primary or chief importance: The principal or main reason for going to Toronto was to visit her daughter and sister.

Learn how to distinguish between principal and principle.

pyorrheal (adjective) (not comparable)
A reference to or characterized by periodontitis or marginal periodontitis: A pyorrheal condition arises from periodontitis, a dental disorder that results from progression of gingivitis, involving inflammation and infection of the ligaments and bones that support the teeth.

regimental (adjective), more regimental, most regimental
Referring to or pertaining to a military formation varying in size from a battalion to a number of battalions: The regimental commander left his regimental headquarters to check on his military unit.
scriptural (adjective) (not comparable)
Relating to, contained in, or according to sacred writings: Scriptural books or written material are based on the Christian Bible.
2. Written or relating to writing: Scriptural books or written material have also made use of archaic expressions, or those that are old or ancient.
septal (adejective) (not comparable)
A reference to or relating to a partition or a dividing wall between two spaces or cavities: The septal cartilage is part of the nasal structure separating the two nostrils.
sinistral (adjective) (not comparable)
1. Preferring to the use of the left foot, the left hand, and/or the left eye: When Joe was wrote on the blackboard in school or threw the baseball during the P.E. period, he made sinistral usage of his left hand, not his right hand.
2. Relating to or located on the left side, especially the left side of the body: Mark's stronger arm was not on the right part of his body, but on the sinistral side.
spinal (adjective) (not comparable)
Relating to a spine, spinal cord, or to the backbone: This is characterized by the functioning of the spinal column independently of the brain, as from an accident, disease, or, in the case of animals, experimental transection, such as in a spinal animal or preparation.
suicidal (adjective), more suicidal, most suicidal
1. Concerning suicide: Dr. Smith was an expert on suicidal behavior and actions of young adults.
2. Regarding a person who attempts to, or is likely to commit suicide: In the car accident, Dave lost his mother, his wife, and three children and was certainly considered to be suicidal.
3. Descriptive of a person who is extremely careless or reckless: Sam drove his car while drinking beer and smoking and his addiction to these habits while driving was seen as absolutely suicidal.