数 nine，many，numerous；名 each of the nine nine-day periods beginning from the day after the Winter Solstice，a surname；

[例句] 他工作极为投入，会从早上七点一刻一直干到晚上九十点。 He works obsessively from 7.15 am to 9 or 10 at night.

[例句] 虽已年届九旬，她依然头脑敏锐，个性很强。 Into her nineties, her thinking remained acute and her character forceful.