IPA: /ˈtɛstɪkəl/
KK: /ˈtɛstɪkəl/
A small, oval-shaped organ in male animals that produces sperm and hormones.
The doctor explained the importance of regular check-ups for testicles.
Testicle → It is formed from "testis" (meaning witness) and the diminutive suffix "-cle" (indicating small). The word "testicle" refers to a small witness, historically relating to the role of the testes in witnessing or confirming male virility.
Think of the word 'testis' meaning witness, and remember that a testicle is a small witness to male fertility.