indefectible

See also: indéfectible

English

Etymology

Etymology tree

Proto-Indo-European *né

Proto-Indo-European *n̥-

Proto-Italic *n̥-

Latin in-bor.

Middle English in-

English in-

Proto-Indo-European *de

Proto-Indo-European *-h₁

Proto-Indo-European *déh₁

Proto-Italic *dē

Latin dē

Latin de-

Proto-Indo-European *dʰeh₁-

Proto-Indo-European *dʰeh₁k-

Proto-Indo-European *-yéti

Proto-Indo-European *dʰh₁kyéti

Proto-Italic *θakjō

Proto-Italic *fakjō

Latin facio

Latin dēficiō

Proto-Indo-European *-tus

Proto-Italic *-tus

Latin -tus

Latin dēfectusbor.

English defect

Proto-Indo-European *-dʰlom

Proto-Italic *-ðlom

Proto-Italic *-ðlis

Latin -bilis

Latin -ibilis

Old French -ibleder.

Middle English -ible

English -ible

English indefectible

From in- + defect + -ible.

Pronunciation

• IPA^(key): /ɪndɪˈfɛktɪbəl/

Adjective

indefectible (comparative more indefectible, superlative most indefectible)

1. Having the ability to resist defect or failure, permanent, lasting.

   Synonym: enduring

2. Without flaw or defect, perfect.

   Synonym: flawless

Derived terms

• indefectibly

Catalan

Adjective

indefectible m or f (masculine and feminine plural indefectibles)

1. unfailing

Spanish

Pronunciation

• IPA^(key): /indefeɡˈtible/ [ĩn̪.d̪e.feɣ̞ˈt̪i.β̞le]
• Rhymes: -ible
• Syllabification: in‧de‧fec‧ti‧ble

Adjective

indefectible m or f (masculine and feminine plural indefectibles)

1. unswerving, resolute

Derived terms

• indefectiblemente

Further reading

• “indefectible”, in Diccionario de la lengua española [Dictionary of the Spanish Language] (in Spanish), 24th edition, Royal Spanish Academy [Spanish: Real Academia Española], 30 October 2026