vi.

1. （伤口等）化脓，发炎；疼痛不已
2. 仍然令人怨恨难消
   His behavior rankles with me still.

   他的行为仍然令我怨恨难消。

vt.

1. 使疼痛；使（伤口）发炎
2. 使怨恨；使痛苦

v.

1. (of a comment or fact) cause continuing annoyance or resentment.
   ▸chiefly N. Amer. annoy or irritate.
2. archaic (of a wound or sore) fester.