The seawater stings my cut.
Kaisui ga kizu ni shimite itai.
indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and
wound; injury; cut; gash; bruise; scratch; scrape; scar; chip; crack; scratch; nick; flaw; defect; weakness; weak point; stain (on one's reputation); disgrace; dishonor; dishonour; (emotional) hurt; hurt feelings
at (place, time); in; on; during; to (direction, state); toward; into; for (purpose); because of (reason); for; with; by; from; as (i.e. in the role of); per; in; for; a (e.g. "once a month"); and; in addition to; if; although
to pierce; to penetrate; to soak in; to permeate; to sting (wound or sensitive area, etc.); to smart; to twinge; to be infected (with vice); to be steeped (with prejudice); to be influenced; to feel keenly; to make a deep impression
painful; sore; exceeding