huì, kuài
to gather
Phonosemantic compound. 合 represents the meaning and 𡆧 represents the sound.
Evolution

Oracle script
(~1250-1000 BC)
Bronze script
Late Western Zhou (~800 BC)
Seal script
Shuowen (~100 AD)
Clerical script
Eastern Han dynasty (25-220 AD)Regular script
ModernDefinitions
huì
to assemble, meet together; a meeting; an organization; can; to be possible; to be able to; will; to be likely to; to be sure to; to assemble; to meet; to gather; to see; union; group; association; CL:個|个[gè]; a moment (Taiwan pr. for this sense is [huǐ])
kuài
to balance an account; accountancy; accounting
Component uses
Sources
季旭昇《說文新證》p.442