彼は胸の傷がもとで１週間後になくなった。

he; him; his; boyfriend

topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis

chest; breast; breasts; bosom; bust; heart; lungs; stomach; heart; mind; feelings

indicates possessive; nominalizes verbs and adjectives; substitutes for "ga" in subordinate phrases; (at sentence-end, falling tone) indicates a confident conclusion; (at sentence-end) indicates emotional emphasis; (at sentence-end, rising tone) indicates question

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

indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and

origin; source; base; basis; foundation; root; cause; ingredient; material; (somebody's) side; (somebody's) location; original cost (or capital, principal, etc.); (plant) root; (tree) trunk; first section of a waka; counter for blades of grass, tree trunks, etc., and for falcons (in falconry); handle (chopsticks, brush, etc.); grip

indicates location of action; at; in; indicates time of action; indicates means of action; cause of effect; by; and then; so; indicates continuing action; indicates certainty, emphasis, etc.

one; best; first; foremost; beginning; start; bottom string (on a shamisen, etc.)

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 be lost (e.g. luggage); to be missing; to be used up; to be run out; to be exhausted; to be consumed; to be reduced to zero; to not occur any more; to disappear (e.g. pain); to be lost (e.g. a dream, confidence)