私の服は油で汚れていた。

I; me; private affairs; personal matter; secrecy; selfishness

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

clothes (esp. Western clothes); counter for doses of medicine, gulps of tea, drags of a cigarette, etc.

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

oil

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.

to get dirty; to become dirty; to become sullied; to become corrupted; to lose one's chastity