Slack-jawed is an expression used to describe someone with their mouth open in surprise or shock. The crossword solutions for this term are AWED (4 letters), AGOG (4 letters), AGAPE (5 letters), AGASP (5 letters), and INAWE (5 letters). All of these words are related to the feeling of being overwhelmed with amazement or admiration. AWED is an adjective meaning filled with awe, AGOG is an adverb meaning eagerly excited, AGAPE is an adjective meaning filled with wonder and admiration, AGASP is an adjective meaning filled with amazement, and INAWE is an adjective meaning filled with reverential respect or wonder.