A murderer (anthrōpoktonos). Old compound (Euripides) from anthrōpos (man) and kteinō (to kill), a man-killer, in N.T. only here and Joh 8:44 (of Satan).
No (pās - ou). According to current Hebraistic idiom = oudeis as in 1Jo 2:19, 1Jo 2:21.
Abiding (menousan). Present active feminine accusative predicate participle of menō, “a continuous power and a communicated gift” (Westcott).