punctual
/ˈpʌŋktjʊəl/adjective
1- happening or doing something at the agreed or proper time守时的, 准时的：
he's the sort of man who's always punctual.
他这人总是很守时。
1.1
- Grammar denoting or relating to an action that takes place at a particular point in time【语法】（动作）瞬息（性）的。与DURATIVE相对。
派生词
punctuality
nounpunctually
adverb词源
late 17th cent.: from medieval Latin punctualis, from Latin punctum 'a point'.