baby-faced 
adjective
Having a youthful or innocent face: baby-faced tough guys...
- It kind of fits given how baby-faced and innocent the young guy seemed.
- But 30 minutes in the company of this disarming and baby-faced individual reveals a tough operator.
- The first person he met was a tall, baby-faced, blond-haired guy who was standing by the entrance of the main room.
- microswitch
- microteaching
- microtechnological
- microtechnology
- microtheory
- microtherm
- microthermal
- microthermic
- micro-thin
- microtine
- microtiter
- microtiter plate
- microtiter well
- microtitre
- microtome
- microtomic
- microtomist
- microtomy
- microtonal
- microtonality
- microtonally
- microtone
- microtopographic
- microtopographical
- microtopography