gaping

(verb) look with amazement; look stupidly. Synonyms: goggle, gape, gawp, gawk.

(verb) be wide open. Synonyms: gape, yawn, yaw. Example: "The deep gaping canyon."

(adj) with the mouth wide open as in wonder or awe. Synonyms: agape(predicate). Examples: "The gaping audience." "We stood there agape with wonder." "With mouth agape."