limit

枠(わく)	Literally, a frame. Window frame. Door frame. Figuratively, a limit to your actions. Color inside the lines. Think of a solution within these parameters. 枠の中で考えてください。

限界(げんかい)	Limit. The sky’s the limit. Superman has unlimited power. $$$

制限(せいげん)	Restrictions – like limits on trade or imports. Rules and regulations designed to restrict something without outright prohibiting it. SITU