punctual

形容词 punctual:

1. acting or arriving or performed exactly at the time appointed

1. Henceforth I expect you to be punctual for meetings.
   我希望你今後准时到会。
2. He's very punctual always arrives on the dot.
   他很守时--总是按时到。
3. He likes his guests to be punctual.
   他喜欢客人守时。
4. A punctual person always finishes everything ahead of time.
   一个守时的人总是把事情提前做好。
5. We cannot guarantee the punctual arrival of trains in fogy weather.
   雾天我们不能保证火车准时到达。
6. Please be punctual in futurity.
   今后请准时。
7. He is always punctual for appointments.
   他总是准时赴约。
8. My cat makes a punctual appearance at mealtimes.
   我的猫一到用餐时间就会准时出现。

punc.tu.al

adj.（形容词）
Acting or arriving exactly at the time appointed; prompt.
准时的：精确地在约定的时间行动或到达；准时的
Paid or accomplished at or by the appointed time.
如期的：在约定时间或到约定时间为止偿还或完成的
Precise; exact.
精确的；确切的
Confined to or having the nature of a point in space.
点的：局限于空间上一点的或具有空间上点的性质的

来源：
Middle English [sharp-pointed]
中古英语 [尖的]
from Medieval Latin pônctu3lis
源自 中世纪拉丁语 pônctu3lis
from Latin pônctum [point] [from neuter past participle of] pungere [to prick] * see pungent
源自 拉丁语 pônctum [点] [] 源自pungere的中性过去分词 [刺] *参见 pungent

【引伸】
punc.tual.ity
punc.tually
adv.（副词）