稠
チュウ, チョウ, おお.い, し.げる

density

JLPT0 G13 S0 F5000

As per 周# (grain plants) + 禾 grain/rice → thick growth or great quantity of grain plants → *grow thick*; *great quantity*; *density*. 稠 was devised to replace 周 after 周 acquired its extended meanings.

[Full Kanji Etymology List]