Answer: sincere

AnswerCrossword Clue
SINCEREWithout hypocrisy
SINCERELike many letter-signers
SINCEREWholehearted
SINCERELike many pen pals
SINCEREHonest
SINCERETruthful
SINCERELike many a correspondent
SINCERECandid; honest
SINCEREFrank
SINCERESquare-dealing
SINCERENot forced
SINCERENot deceitful
SINCERENot false
SINCEREStraight-shooting
SINCEREUnaffected
SINCEREHypocrisy free
SINCEREWithout an ulterior motive
SINCERESingle-hearted
SINCEREOn the level
SINCERENot snarky
SINCEREWithout ulterior motive
SINCERENot kidding
SINCEREAuthentic
SINCERENot faking it
sinceregenuine
sinceregenuine (authentic)
sincerehonest
SINCEREGenuine.
SINCEREReal
SINCEREEarnest
SINCEREStraight
SINCEREUndissembling
SINCEREWithout pretensions
SINCEREGenuine
SINCEREForthright
SINCEREOpen
SINCEREFrom the heart
SINCEREUp-front
SINCERECandid
SINCERENot affected