GRAMMATICALLY
grammatically
(adverb) in a grammatical manner; “this child already speaks grammatically”
Source: WordNet® 3.1
Etymology
Adverb
grammatically (comparative more grammatically, superlative most grammatically)
in a grammatical manner
concerning grammar
Source: Wiktionary
GRAMMATIC
Gram*mat"ic, a.
Definition: Grammatical.
GRAMMATICAL
Gram*mat"ic*al, a. Etym: [L. grammaticus, grammaticalis; Gr.
grammatical. See Grammar.]
1. Of or pertaining to grammar; of the nature of grammar; as, a
grammatical rule.
2. According to the rules of grammar; grammatically correct; as, the
sentence is not grammatical; the construction is not grammatical. --
Gram*mat"ic*al*ly, adv.
– Gram*mat"ic*al*ness, n.
Source: Webster’s Unabridged Dictionary 1913 Edition