sincere
absorbing
acute
ardent
bona fide
committed
dedicated
deep
deep-felt
deepgoing
devoted
earnest
fervent
fervid
genuine
hearty
homefelt
honest
indelible
keen
passionate
penetrating
pervading
piercing
poignant
profound
serious
sharp
true
unfeigned
wholehearted
filial
inexpressible
inward
mock
rapturous
reverent
tearful
tenderest
unbounded
unqualified
unspoken
warmest
wordless