右 is built from the 𠂉 (person (top of 毎·気)) and 口 components.
It belongs to a phonetic family with 有, 友, and 雄 — they share the 𠂉 component and the reading ユウ.
A common word using 右 is 右 (みぎ), meaning “right hand side”.
Don't confuse it with 石, 古, and 占 — 石 (stone): 口 sits under the cliff · 右 (right): 口 sits under a hand