sin·cere
[sin-seer]
–adjective, -cer·er, -cer·est.
1. free of deceit, hypocrisy, or falseness; earnest: a sincere apology.
2. genuine; real: a sincere effort to improve; a sincere friend.
3. pure; unmixed; unadulterated.
4. Obsolete . sound; unimpaired.