childlike (adj.)
- angelic
- artless
- babyish
- beardless
- blameless
- bluff
- blunt
- boyish
- boylike
- candid
- childish
- clear
- coltish
- confiding
- credulous
- decrepit
- dependent
- direct
- doddering
- doddery
- doting
- faultless
- frank
- girlish
- guileless
- guiltless
- immature
- incorrupt
- infantile
- ingenuous
- innocent
- lamblike
- maiden
- maidenly
- naive
- offenseless
- open
- openhearted
- outspoken
- plain
- prelapsarian
- pristine
- puerile
- puppyish
- puppylike
- reliant
- senile
- simple
- sincere
- single-minded
- sinless
- trustful
- trusting
- trusty
- unassuming
- uncorrupted
- undefiled
- unguarded
- unreserved
- unsophisticated
- unsuspecting
- unsuspicious
- unwary
- young
- youthful
With the smile that was childlike and bland.