缄 緘 jian1
letters; to close; to seal

strokes 15
radical
纟
糸
strokes after radical 9
缄口不言 緘口不言 jian1 kou3 bu4 yan2
lips sealed and not saying anything (idiom); fig. to omit mention (of a non-person or embarrassing topic); to censor

缄默 緘默 jian1 mo4
to keep silent