UNCHRISTIANLY
unchristianly, unchristlike
(adjective) not becoming to or like a Christian; “ashamed to have to recognize how unchristianly his assumptions and motives are”
Source: WordNet® 3.1
Etymology
Adverb
unchristianly (comparative more unchristianly, superlative most unchristianly)
In an unchristian way.
Adjective
unchristianly (comparative more unchristianly, superlative most unchristianly)
unchristian
Source: Wiktionary
Un*chris"tian*ly, a.
Definition: Unchristian. Milton.
Un*chris"tian*ly, adv.
Definition: In an unchristian manner.
UNCHRISTIAN
Un*chris"tian, a. Etym: [Pref. un- not + Christian.]
1. Not Christian; not converted to the Christian faith; infidel.
2. Contrary to Christianity; not like or becoming a Christian; as,
unchristian conduct.
Un*chris"tian, v. t. Etym: [1st pref. un- + Christian.]
Definition: To make unchristian. [Obs.] South.
Source: Webster’s Unabridged Dictionary 1913 Edition