tristeza
sadness
triste
sad
+
-eza
noun suffix (quality or state)
Tristeza means sadness and is formed from the Spanish adjective triste0 (sad0) plus the suffix -eza1, which creates a noun indicating a quality or state1.
noun
- sadnessA feeling of sadness or sorrowLa tristeza invadió su corazón después de la pérdida. // Sadness filled his heart after the loss.