Word: thouest
Part of speech: Verb
Syllables: thou
est
Definition: Alternative form of thou; the cardinal number that is the product of 10 and 100
Morphemes:
Affix: thou
Language: en
Meaning: to address as 
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)