大事な約束を守ります。

N4 大事 daiji important, valuable, serious matter N4 約束 yakusoku promise, appointment, arrangement

N5 大 dai, tai / oo-, oo.kii, -oo.ini large, big, grand N4 事 ji, zu / koto, tsuka.u, tsuka.eru matter, thing, fact N3 約 yaku / tsuzu.maru, tsuzu.meru, tsuzuma.yaka promise, approximately, shrink N3 束 soku / taba, taba.neru, tsuka, tsuka.neru bundle, sheaf, ream N3 守 shu, su / mamo.ru, mamo.ri, mori, -mori, kami guard, protect, defend

N5 〜ます masu Used at the end of verbs, polite present or future form, makes the sentence more polite N5 〜を o Marks the direct object of an action, appears before the verb, shows what receives the action