flaquito
skinny
flaco
thin, skinny
+
-ito
diminutive suffix
Flaquito means skinny and is formed from flaco0 (thin, skinny0) + -ito1 (diminutive suffix1), implying someone who is thin in a small or endearing way.
adjective
- skinnyVery thin or skinny, often used affectionatelyMi hermano siempre ha sido flaquito. // My brother has always been skinny.