渡
ト, わた.る, わた.る, わた.す, お, たり, わたな, わたら, わたり
transit, ford, ferry, cross, import, deliver, diameter, migrate
JLPT3 G7 S12 F446
As per 度# (pile in increments) + 水 water → *ferry* piles of objects across a river in increments → *cross* (a river) → *hand over* (← pass from one hand to another).
[Full Kanji Etymology List]