Word: headfirst
Part of speech: Adverb
Syllables: head
first
Definition: Rashly; precipitately; without deliberation; hastily.
Morphemes:
Affix: head
Language: en
PoS: Adjective
Meaning: Coming from in front.
Affix: first
Language: en
PoS: Adverb
Meaning: Before anything else; firstly.