harmony
諧 centers on harmony: a state where different elements come together smoothly and agreeably, like voices blending in unison.
諧 combines 言 (speech, words) with 皆 (all, together), suggesting harmony through unified speech or agreement.
Words (言) spoken together (皆) create harmony, like a choir singing in perfect unison.
For カイ, imagine a harmonious choir singing in a bright, open sky: sky -> カイ, and their voices blend perfectly.
haikai (collective name for haiku, haibun, haiga, senryū, etc.)
joke; jest; banter
haikai no renga (humorous, often vulgar style of renga which emerged in the 16th century)
haiku-like quality; clever feeling; witty flavor
writer of haikai poems
assonance
harmonious divorce settlement
Hexie (Chinese high-speed train)
parlour game in which three people each write one line of a 5-7-5 poem (without seeing the other lines; often producing humorous results); tengu haiku
smooth-talking and humorous; with jocose and comical airs
gentle mutual affection; harmony
vocal harmony; harmonious voice; harmonious voices
harmonious melody; harmony; unity; euphony
to crack jokes