'Wonderment' is the feeling you have when something is so beautiful or so strange that you just look at it, a little lost for words. It is surprise mixed with pleasure and a touch of respect. You watch a firework display in wonderment; a child stares in wonderment at a big animal at the zoo. The word is uncountable — you have wonderment, not 'a wonderment' — and it lives mostly in three phrases: 'in wonderment', 'with wonderment', and 'a sense of wonderment'. Now the honest part: 'wonderment' and 'wonder' mean nearly the same thing, and 'wonder' is the word people actually use. 'Wonderment' is longer, more formal, more literary, and it sounds a bit old. Some writers choose it exactly because the extra syllables slow the sentence down and make the moment feel bigger. Others feel it is overwritten. It shows up a lot in writing about childhood, nature, and art. In ordinary speech, you would say 'I couldn't believe it' or 'It was amazing'.

驚奇（讚嘆）之感；驚嘆