禁 prohibition

My KINfolk prohibited me from showing two trees in a row. (they are afraid someone will steal both of our trees)

no smoking ★★★★☆
禁 (prohibition) + 煙 (smoky) = 禁煙 (no smoking)

forbidden ★★★★☆
禁 (prohibition) + 止 (stop) = 禁止 (forbidden)

forbidden by law. Common examples: smoking outdoors, parking your bike here, opening this door, busking on the street, breathing on a grandpa.

no entry ★★★☆☆ NP
立 (stand up) + 入 (put/go in) + 禁 (prohibition) + 止 (stop) = 立ち入り禁止 (no entry)

do not cross this line, no entry.

strictly forbidden. ★★☆☆☆
厳 (strict) + 禁 (prohibition) = 厳禁 (strictly forbidden. )

taboo or forbidden thing ★☆☆☆☆
禁 (prohibition) + 物 (animal / thing) = 禁物 (taboo or forbidden thing )