ク, か.ける, か.る

drive, run, gallop, advance, inspire, impel

JLPT1 G7 S14 F1033

As per # (curve/bend) + 馬 horse → horse lowering its back in galloping → *gallop* → *rush*; *drive/spur/urge on*; *run*; *ride* → *impel*.

[Full Kanji Etymology List]