MEANING: verb tr.: To gift, tip, or pledge.
noun: A gift or tip.

ETYMOLOGY: From Latin propinare (to drink to someone’s health, to present), from Greek propinein (to drink first, to give), from pro- (for, before) + pinein (to drink). Earliest documented use: 1448.

PYROPINE - the conifer wood burns well, but it'll coat your chimney with a flammable residue.

PROSINE - against cosines and tangents

PRE-OPINE - My mind is made up; don't confuse me with facts !