Dict: strongs - sincerely

Strongs:

H8549 @ תּמים tâmîym taw-meem' From H8552; entire ({literally} figuratively or morally); also (as noun) {integrity} truth: - without {blemish} {complete} {full} {perfect} sincerely ({-ity}) {sound} without {spot} {undefiled} upright ({-ly}) whole.

G55 @ ἁγνῶς hagnōs hag-noce' Adverb from G53; purely that is honestly: - sincerely.