This is the 427th most frequent Armenian word.
ամբողջությամբ
Completely; entirely.
Here, 'ամբողջությամբ' ('completely') is used as an adverb to signify the complete and thorough action of reading.
Նա ամբողջությամբ կարդաց գիրքը։
He read the book completely.
In this sentence, 'ամբողջությամբ' ('completely') is used to emphasize the adjective 'wrong', signifying the degree of error in the assumption.
Ամբողջությամբ սխալ էր նրա ենթադրությունը։
His assumption was completely wrong.
Here, 'ամբողջությամբ' ('completely') is used to modify the verb 'agree', indicating total agreement.