寅 - Dong Chinese dictionary 寅 | 3rd earthly branch | yín to respect, reverence, respectfully, 3rd terrestrial branch - yín 3rd earthly branch: 3-5 a m , 1st solar month (4th February-5th March), year of the Tiger, ancient Chinese compass point: 60° | Originally written the same as 矢 (arrow)
寅 - Wiktionary, the free dictionary Smith points to the possible relation between 寅 (OC *lin) and 引 (OC *linʔ, “to stretch, to draw (a bow)”) (noted earlier by James Mellon Menzies); and that both graphs 寅 and 引 were used interchangeably as phonophorics for 螾 (OC *lin, *linʔ) and 蚓 (OC *linʔ), meaning "worm"