доктор

From LSJ

τὸ δ' ἐξαίφνης τὸ ἐν ἀναισθήτῳ χρόνῳ διὰ μικρότητα ἐκστάν → suddenly refers to what has departed from its former condition in a time imperceptible because of its smallness

Source

Russian > Greek

ἰατήρ, ἰητήρ, ἰατρός, ἰητρός, κλινικός, παιώνιος