彼とはどうも呼吸が合わない。

he; him; his; boyfriend

if; when; and; with; particle used for quoting (with speech, thoughts, etc.); quoting particle; promoted pawn; indicates question (sentence end)

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

thanks; much (thanks); very (sorry); quite (regret); quite; really; mostly; somehow; in spite of oneself; no matter how hard one may try (one is unable to) (with negative verb); no matter how hard one may try not to (one ends up doing) (with positive verb, esp. -shimau); greetings; hello; goodbye

breath; respiration; knack; trick; secret (of doing something)

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

to come together; to merge; to unite; to meet; to fit; to match; to suit; to agree with; to be correct; to be profitable; to be equitable; to do ... to each other; to do ... together