彼らの兄弟はとても背が高いです

彼: he, his, him, boyfriend
ら: la, ra, from, et al
の: to, of
兄弟: brother, brothers, sibling, siblings, brotherhood, fraternal
は: a, the, is, am, are, will
とても: very, real, heap, extremely, badly, damn, terribly, overly, awfully, darn
背: tall, back, stature, reverse, spine, dorsal
が: is, there, but, ga, will, however
高い: high, tall, expensive, highly, greater
です: is, be, are, am, that, away