cintura
waist
cinch
to tighten
+
-ura
noun suffix
Cintura means waist and can be remembered by thinking of the English word cinch0 (to tighten0, as you might tighten a belt around your waist) with the Spanish noun suffix1 -ura1.
noun
- waistThe part of the human body between the ribs and the hips.El vestido le quedaba ajustado en la cintura. // The dress fit tightly around her waist.