1 twenty-eighth year H4 of the 60 year cycle, e.g. 2011 or 2071

1 fourth year D4 of the 60 year cycle, e.g. 1987 or 2047

1 5-7 am (in the system of two-hour subdivisions used in former times)

1 fifty-second year B4 of the 60 year cycle, e.g. 1975 or 2035

1 mortise (slot cut into wood to receive a tenon)

2 4th earthly branch: 5-7 a.m., 2nd solar month (6th March-4th April), year of the Rabbit

3 ancient Chinese compass point: 90° (east)

4 variant: 铆 mǎo

5 to exert one's strength