驚いたことにドアの錠がはずされていた。

to be surprised; to be astonished

thing; matter; incident; occurrence; event; something serious; trouble; crisis; circumstances; situation; state of affairs; work; business; affair; after an inflectable word, creates a noun phrase indicating something the speaker does not feel close to; nominalizing suffix; pretending to ...; playing make-believe ...; alias; aka; nickname; alternative name; also known as

at (place, time); in; on; during; to (direction, state); toward; into; for (purpose); because of (reason); for; with; by; from; as (i.e. in the role of); per; in; for; a (e.g. "once a month"); and; in addition to; if; although

door (Western-style)

indicates possessive; nominalizes verbs and adjectives; substitutes for "ga" in subordinate phrases; (at sentence-end, falling tone) indicates a confident conclusion; (at sentence-end) indicates emotional emphasis; (at sentence-end, rising tone) indicates question

lock; padlock; tablet; lozenge; pill

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

to unfasten; to undo; to remove; to take off; to deinstall; to leave; to step out; to slip away; to miss (a target)