Punctual
来自Big Physics
late 17th century: from medieval Latin punctualis, from Latin punctum ‘a point’.
wiktionary
etymonline
punctual (adj.)
c. 1400, "having a sharp point; producing punctures," senses now rare or obsolete, from Medieval Latin punctualis, from Latin punctus "a pricking" (from nasalized form of PIE root *peuk- "to prick").
The meaning "prompt" is recorded by 1670s, from the notion of "exact, precise, insisting on fine points," including the observation of time and the keeping of appointments (c. 1600). Related: Punctually.
