-an

One skilled in the knowledge of herbs, a herbalist.

1. Someone who works in or is in charge of a library.
2. The keeper or custodian of a library.

Literally, "of books". Also, "a scribe or someone who is concerned with books".

Someone who is skilled in reasoning: The professor was a highly respected logician.

1. Of or belonging to mercenary soldiers.
2. Someone who works or serves only for personal profit or who is motivated solely by a desire for money.

1. On foot, going or walking on foot; performed on foot; of or pertaining to walking.
2. Representing a person on foot, as distinguished from equestrian.
3. Applied to plain prose as opposed to verse, or to verse of prosaic character; hence, prosaic, commonplace, dull, uninspired; colloquial, vulgar.

A producer of, or someone who presents, fireworks.

1. Someone who is skilled in, or professionally occupied with, the medical and surgical treatment of cattle and domestic animals; a veterinary surgeon.
2. A reference to a doctor who treats animals.
3. Etymology: from 1646, formed in English (perhaps by influence of French veterinaire) from Latin veterinarius, "of or having to do with beasts of burden"; also, "cattle doctor", from veterinum, "beast of burden", maybe from vetus,"old"; possibly from the notion of being "experienced", or being "one year old"; hence, strong enough to pull burdens.

Another theory connects it to Latin, vehere "to draw, to pull", based on the notion of "used as a draft animal".