Tact
来自Big Physics
mid 17th century (denoting the sense of touch): via French from Latin tactus ‘touch, sense of touch’, from tangere ‘to touch’.
wiktionary
Borrowed from Latin tāctus. Sense “keen perception” developed in French tact. [1]
etymonline
tact (n.)
1650s, "sense of touch or feeling" (with an isolated instance, tacþe from c. 1200), from Latin tactus "a touch, handling, sense of touch," from root of tangere "to touch," from PIE root *tag- "to touch, handle." Meaning "sense of discernment in action or conduct, diplomacy, fine intuitive mental perception" first recorded 1804, from development in French cognate tact. The Latin figurative sense was "influence, effect."
