to worry

from μέριμνα; to be anxious about:--(be, have) care(-ful), take thought.

from a compound of μετά and a collateral form of αἴρω or perhaps rather ἀήρ (compare "meteor"); to raise in mid-air, i.e. (figuratively) suspend (passively, fluctuate or be anxious):--be of doubtful mind.