Verb (5-dan, る, intransitive)
1. to become damp; to become moist; to become wet
まだ少し湿っています。It is still a little damp.
2. to lack energy; to be in a slump; to be in low spirits; to feel depressed
often as 湿って or 湿った
when read as "しめる"
彼の一言で、場がすっかり湿ってしまった。His remark completely dampened the mood.