伴侣
bànlǔ · HSK 7
companion
👫 bàn = half + lǚ = companion — two halves walking together
伴 (bàn) combines 人 (person) and 半 (half), suggesting one half of a pair. 侣 (lǚ) pairs 人 with 吕, reinforcing the idea of two people linked. Together: your other half, your companion.
伴 — person radical 亻 + half 半
A semantic-phonetic compound: 亻(person) gives the meaning and 半 (bàn, 'half') supplies the sound while also hinting at 'one of a pair.' The original sense was 'companion' or 'partner,' someone who is your other half, and from there it extended to 'accompany.'