• 左手ひだりて — left hand
• 左側ひだりがわ — left side
• 左利ひだりきき — left-handed
• 左折させつ — left turn (e.g. in driving/navigation)
• 左派さは — left wing (politics)

“左” is a foundational directional kanji. It pairs with its opposite — 右 (right) — and appears in navigation, everyday speech, and descriptions of movement. It's one of the first directional kanji students encounter.