to take part in / to participate / to join / to attend / to counsel / unequal / varied / irregular / uneven / not uniform / abbr. for 參議院|参议院 Senate, Upper House
参
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Mnemonic symbol: a bib number.
The King of Chu takes part in a marathon starting in front of the anthill, and he already fixed his bib number to his shirt. Right next to him there is a mysterious, huge person fixing their bib number to their shirt. It is a big robot in disguise to be allowed to participate. The robot disguised itself with a fake nose and a long fake Santa Clause beard.