彼はもてる物すべてを失った。

he; him; his; boyfriend

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

to be able to possess (hold, get, etc.); to be well liked; to be popular; to be pampered (spoiled, doted upon, etc.); to be welcomed; to endure (the tests of time, the elements, etc.); to last; possessed; possessing riches; having wealth

thing; object; article; stuff; substance; one's things; possessions; property; belongings; things; something; anything; everything; nothing; quality; reason; the way of things; used to emphasize emotion, judgment, etc.; used to indicate a common occurrence in the past (after a verb in past tense); used to indicate a general tendency; used to indicate something that should happen; item classified as ...; item related to ...; work of ...; cause of ...; cause for ...; somehow; somewhat; for some reason; really; truly

everything; all; the whole; entirely; completely; wholly; all

indicates direct object of action; indicates subject of causative expression; indicates an area traversed; indicates time (period) over which action takes place; indicates point of departure or separation of action; indicates object of desire, like, hate, etc.

to lose; to part with