male adult / the 4th of the 10 Heavenly Stems 天干[tian1 gan1] / fourth (used like "4" or "D") / small cube of meat or vegetable / (literary) to encounter / (archaic) ancient Chinese compass point: 195° / (chemistry) butyl
mortise (slot cut into wood to receive a tenon) / 4th earthly branch: 5-7 a.m., 2nd solar month (6th March-4th April), year of the Rabbit / ancient Chinese compass point: 90° (east) / variant of 鉚|铆[mao3] / to exert one's strength