団
ダン, トン, かたまり, まる.い

group, association

JLPT2 G5 S6 F213

As per 專# (round and/or rotating object) + 囗 circular enclosure → *group* completely surrounded by a *round* enclosure → *mass*; *lump*; *sphere* (← round/roundish objects).

[Full Kanji Etymology List]