彼女がお化粧してないときは見ものだった。

She was a sight when she didn't wear makeup.

彼女(かのじょ)がお化粧(けしょう)してないときは見(み)ものだった。

Kanojo ga o keshōshitenai toki wa mimono datta.

彼女 (かのじょ)

she; her; her; girlfriend; sweetheart

が (が)

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

御 (お、おん)

honorific/polite/humble prefix

化粧 (けしょう、けわい、けそう)

make-up; makeup; cosmetics

とき (とき)

regular (stops at every station) Jouetsu-line Shinkansen

は (は)

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

見物 (みもの)

sight; attraction; spectacle; something worth seeing

だ (だ)

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

Readings: ヒ、かれ、かの、か.の

Meanings: he, that, the

Readings: ジョ、ニョ、ニョウ、おんな、め

Meanings: woman, female

Readings: カ、ケ、ば.ける、ば.かす、ふ.ける、け.する

Meanings: change, take the form of, influence, enchant, delude, -ization

Reading: ショウ

Meanings: cosmetics, adorn (one's person)

Readings: ケン、み.る、み.える、み.せる

Meanings: see, hopes, chances, idea, opinion, look at, visible