OpenEtymology

undesired

UKˌʌndɪˈzaɪədUSˌʌndɪˈzaɪərd

Meaning

1adj

not wanted or wished for; not desired.

Structure

word structure
1
un
not
+
2
desire
to wish for
+
3
d
past participle suffix

Usage

the software update had several undesired side effects.

they took measures to prevent any undesired attention.

the chemical reaction produced an undesired byproduct.

Etymology

The word 'undesired' is a Modern English formation built upon the older verb 'desire'. The core, 'desire', entered English from Old French desirer, which itself derives from Latin desiderare, meaning "to long for, wish for, or miss". The Latin term may have originally carried a sense of "ceasing to see (a star)" and thus coming to long for it. The English prefix 'un-', of Germanic origin, is a prolific negator, attached here to the past participle form 'desired' to create an adjective meaning "not wished for". This straightforward morphological process illustrates how English readily combines native and borrowed elements to generate precise, opposite meanings.

Analysis

Structure
un (not) + desire (to wish for) + d (past participle suffix)=unnot+desireto wish for+dpast participle suffix

un- (old english, a prefix meaning "not"); desire (latin via old french, meaning "to wish for, long for"); -ed (old english, a suffix forming adjectives from verbs, often with a passive or resultant meaning).

Undesired Meaning & Word Parts (un + desire + d) | OpenEtymology