コロンブスは地球が丸いと信じていた。

コロンブスは地球が丸いと信じていた。

Columbus believed that the Earth was round.

コロンブスは地球(ちきゅう)が丸(まる)いと信(しん)じていた。

Koronbusu wa chikyū ga marui to shinjiteita.

は (は)

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

地球 (ちきゅう)

the earth; the globe

が (が)

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

丸い (まるい、まろい)

round; circular; spherical; harmonious; calm

と (と)

if; when; and; with; particle used for quoting (with speech, thoughts, etc.); quoting particle; promoted pawn; indicates question (sentence end)

信じる (しんじる)

to believe; to believe in; to place trust in; to confide in; to have faith in

Readings: チ、ジ

Meanings: ground, earth

Readings: キュウ、たま

Meanings: ball, sphere

Readings: ガン、まる、まる.める、まる.い

Meanings: round, full (month), perfection, -ship, pills, make round, roll up, curl up, seduce, explain away

Reading: シン

Meanings: faith, truth, fidelity, trust