Word: seizest
Part of speech: Verb
Syllables: sei
zest
Definition: Alternative form of seize; take hold of; grab
Morphemes:
Affix: seize
Language: en
PoS: Verb
Meaning: To deliberately take hold of; to grab or capture.
Etymology Compounds: Affix: seisir
Language: fro
Decoded: seisir
Meaning: to take possession of; invest 
Affix: -est
Language: en
PoS: Suffix
Meaning: Used to form the second-person singular present tense and past tense of verbs. (if thou is the subject; not used with you)