もう少し努力していれば、彼は成功しただろう。

With a little more effort, he would have succeeded.

もう少(すこ)し努力(どりょく)していれば、彼(かれ)は成功(せいこう)しただろう。

Mōsukoshi doryokushiteireba, kare wa seikōshita darou.

もう少し (もうすこし)

a bit more; a bit longer

努力 (どりょく)

great effort; exertion; endeavour; endeavor; effort

彼 (かれ)

he; him; his; boyfriend

は (は)

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

成功 (せいこう)

success; hit

だ (だ)

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

Readings: ショウ、すく.ない、すこ.し

Meanings: few, little

Readings: ド、つと.める

Meanings: toil, diligent, as much as possible

Readings: リョク、リキ、リイ、ちから

Meanings: power, strength, strong, strain, bear up, exert

Readings: ヒ、かれ、かの、か.の

Meanings: he, that, the

Readings: セイ、ジョウ、な.る、な.す、 -な.す

Meanings: turn into, become, get, grow, elapse, reach

Readings: コウ、ク、いさお

Meanings: achievement, merits, success, honor, credit