IPA: /ˌʌn.dɪˈsɛn.dɪd/
KK: /ʌnˈdɛsɛndɪd/
Referring to a condition where something, typically a testicle, has not moved down into its normal position in the body.
The doctor explained that the baby had an undescended testicle, which might require surgery.
Undescended → It is formed from "un-" (meaning not) and "descend" (from Latin "descendere", meaning to climb down or come down). The word "undescended" refers to something that has not descended or moved down to its expected position.
Think of something that has 'not' ('un-') 'come down' ('descendere') to where it should be — that's why undescended means it hasn't moved down.