彼らの間でつまらないことをめぐってけんかが始まった。

they (usually male); them

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

space; room; time; pause

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.

dull; uninteresting; boring; tedious; insignificant; unimportant; trifling; trivial; worthless; absurd; foolish; silly; stupid; useless; pointless; disappointing

thing; matter; incident; occurrence; event; something serious; trouble; crisis; circumstances; situation; state of affairs; work; business; affair; after an inflectable word, creates a noun phrase indicating something the speaker does not feel close to; nominalizing suffix; pretending to ...; playing make-believe ...; alias; aka; nickname; alternative name; also known as

in regard to; concerning (usu. of disputes)

quarrel; brawl; fight; squabble; scuffle; argument

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

to begin; to start; to commence; to happen (again); to begin (anew); to date (from); to originate (in)