Word: dumbstruck
Part of speech: Adjective
Syllables: dumb
struck
Definition: so shocked as to be unable to speak
Morphemes:
Affix: dumb
Language: en
PoS: Adjective
Meaning: Unable to speak; lacking power of speech (kept in "deaf, dumb, and blind").
Affix: struck
Language: en
PoS: Verb
Meaning: Simple past tense and past participle of strike; hit against; come into sudden contact with