Word: earthfast
Part of speech: Adjective
Syllables: earth
fast
Definition: Constructed with vertical roof-bearing timbers (posts) in direct contact with the ground, whether set in excavated holes or otherwise.
Morphemes:
Affix: earth
Language: en
PoS: Verb
Meaning: To burrow.
Affix: fast
Language: en
PoS: Adjective
Meaning: Firmly or securely fixed in place; stable.