其
qí · HSK 5
its
🧺 Sounds like 'chee'; pictograph of a winnowing basket, borrowed for 'its/their'
Original 其 depicted a bamboo winnowing basket (later written 箕). The character was borrowed phonetically for the possessive pronoun 'its/his/her/their', so the basket meaning got a new form while 其 kept the grammar job.
其 — top 八 + winnowing basket 其 (originally 箕)
Originally a pictograph of a bamboo winnowing basket, now written 箕 with the bamboo radical added on top. The original form 其 was borrowed phonetically to write the pronoun and particle meaning 'his/her/its' or 'that.' This loan use became dominant, so a new character 箕 was created for the basket meaning.