Word: sweepest
Part of speech: Verb
Syllables: swee
pest
Definition: Alternative form of sweep; to cover or extend over an area or time period; 
Morphemes:
Affix: sweep
Language: en
PoS: Noun
Meaning: A single action of sweeping.
Affix: -est
Language: en
PoS: Suffix
Meaning: Used to form the superlative of adjectives and adverbs.