もう少し根気があったら成功していただろう。

With a little more patience, you would have succeeded.

もう少(すこ)し根気(こんき)があったら成功(せいこう)していただろう。

Mōsukoshi konki ga attara seikōshiteita darou.

もう少し (もうすこし)

a bit more; a bit longer

根気 (こんき)

patience; perseverance; persistence; tenacity; energy

が (が)

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

有る (ある)

to be (usu. of inanimate objects); to exist; to live; to have; to be located; to be equipped with; to happen; to come about

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: コン、ね、 -ね

Meanings: root, radical, head (pimple)

Readings: キ、ケ、いき

Meanings: spirit, mind, air, atmosphere, mood

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