wonder

Concise Oxford English Dictionary © 2008 Oxford University Press:
wonder/ˈwʌndə(r)/

▶noun

• 1 a feeling of surprise and admiration, caused by something beautiful, unexpected, or unfamiliar.

• 2 a person or thing that causes such a feeling.

  ■ [as modifier] having remarkable properties or abilities: a wonder drug.

▶verb

• 1 feel curious; desire to know.

  ■ used to express a polite question or request.

• 2 feel doubt.

• 3 feel wonder.

– phrases
I shouldn't wonder informal I think it likely.
no (or little or small) wonder it is not surprising.
nine days' (or seven-day or one-day) wonder something that attracts great interest for a short while but is then forgotten.
wonders will never cease often ironic an exclamation of surprise and pleasure.
work (or do) wonders have a very beneficial effect.

– derivatives
wonderer noun,
wondering adjective,
wonderingly adverb.

– origin OE wundor (n.), wundrian (v.), of Gmc origin.