私がたずねたとき、彼女はたまたま留守であった。

It happened that she was out when I called.

私(わたし)がたずねたとき、彼女(かのじょ)はたまたま留守(るす)であった。

Watashi ga tazuneta toki, kanojo wa tamatama rusu de atta.

私 (わたし、わたくし)

I; me; private affairs; personal matter; secrecy; selfishness

が (が)

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

尋ねる (たずねる)

to ask; to enquire; to inquire; to search; to look for; to look into; to investigate

とき (とき)

regular (stops at every station) Jouetsu-line Shinkansen

彼女 (かのじょ)

she; her; her; girlfriend; sweetheart

は (は)

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

偶々 (たまたま)

casually; unexpectedly; accidentally; by chance

留守 (るす)

absence; being away from home; house-sitting; house-sitter; being left unattended to (of one's studies, etc.); neglecting

だ (だ)

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

或 (ある)

a certain ...; some ...

Readings: シ、わたくし、わたし

Meanings: private, I, me

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: リュウ、ル、と.める、と.まる、とど.める、とど.まる、るうぶる

Meanings: detain, fasten, halt, stop

Readings: シュ、ス、まも.る、まも.り、もり、 -もり、かみ

Meanings: guard, protect, defend, obey