可笑しい

Etymology
Two derivations appear to have credence.
 * From noun . The sense development would have been, ,.
 * Similar to the formation of from verb, from the sense of having a quality to make one want to go towards, from verb .  The sense development would have been , , ,.

Considering the sense grouping, it appears that this might be a fusion of derivations, or of influence. The now-obsolete senses pertaining to first arise in the late  and would seem to fit the latter verb derivation. There are several other adjectives with similar derivation patterns, as [VERB STEM] + -ashii or -oshii.

Meanwhile, the current senses pertaining to and  first appear earlier in the  and would seem to fit the former noun derivation.

The spelling uses the characters +, likely borrowed from written 🇨🇬.

Adjective

 * 1) funny:
 * 2) funny, laughable
 * 3) strange, odd
 * 4) unreasonable, illogical
 * 5)  interesting:
 * 6) interesting
 * 7) tasteful
 * 8) beautiful and attractive
 * 9) excellent, superb
 * 1) tasteful
 * 2) beautiful and attractive
 * 3) excellent, superb

Usage notes
The 可笑しい spelling has become rare in modern usage, superseded by the hiragana spelling.

Similar to and, this adjective also has an adnominal form  that only attaches to nouns, and that cannot be used as the predicate of a sentence.