いつも約束は守るべきだ。

いつも約束は守るべきだ。

You should always keep your word.

いつも約束(やくそく)は守(まも)るべきだ。

Itsumo yakusoku wa mamoru beki da.

何時も (いつも)

always; usually; every time; never

約束 (やくそく)

promise; agreement; arrangement; one's word; contract; pact; appointment; engagement; date; convention; rule; destiny; fate

は (は)

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

守る (まもる)

to protect; to guard; to defend; to keep (i.e. a promise); to abide (by the rules); to observe; to obey; to follow

可し (べし)

shall; should; must

だ (だ)

be; is; indicates past or completed action; indicates light imperative

Readings: ヤク、つづ.まる、つづ.める、つづま.やか

Meanings: promise, approximately, shrink

Readings: ソク、たば、たば.ねる、つか、つか.ねる

Meanings: bundle, sheaf, ream, tie in bundles, govern, manage, control

Readings: シュ、ス、まも.る、まも.り、もり、 -もり、かみ

Meanings: guard, protect, defend, obey