noun, na-adjective
unclear speech; slurred speech
Archaic term describing speech that is indistinct or poorly articulated, often due to a physical condition or drunkenness. Not used in modern everyday language.
彼は酒に酔って舌つきが怪しくなった。
He got drunk and his speech became slurred.
Modern common expression for slurred or unclear speech, whereas 舌つき is archaic.
Compound of 舌 (tongue) and つき (manner of doing something, from 付く). The exact historical derivation is uncertain.