Word Pronunciation & Dictionary

deleterious

/ˌdɛ.ləˈtɪɹ.i.əs/

Word Rarity Rare

Frequency: 2.72 in modern English

Syllables
dele-te-ri-ous
IPA
/ˌdɛ.ləˈtɪɹ.i.əs/
12
Scrabble Score
11
Letters
5
Syllables
9
Unique Chars

Meaning

adj

Harmful, often in a subtle or unexpected way.

Formal

Example Sentences

Etymology

Adapted borrowing (1640s; 1582 as deletorious) of New Latin dēlētērius, dēlētōrius + -ous, from Ancient Greek δηλητήριος (dēlētḗrios, “noxious, deleterious”), from δηλητήρ (dēlētḗr, “a destroyer”), from δηλέομαι (dēléomai, “I hurt, damage, spoil, waste”). Not related to delete or deleble. Doublet of deletery.

Origin

Word Breakdown

Regional Pronunciation

  • American English: /ˌdɛ.ləˈtɪɹ.i.əs/
  • British English: /ˌdɛl.ɪˈtɪə̯.ɹi.əs/

Usage

Inflected Forms

more deleterious (comparative) most deleterious (superlative) deletorious (alternative)

Derived Forms

Synonyms

Rhymes With

Questions

How do you pronounce deleterious?
The recorded pronunciation is /ˌdɛ.ləˈtɪɹ.i.əs/.
What does deleterious mean?
Harmful, often in a subtle or unexpected way.
Where does deleterious come from?
It is traced to Ancient Greek.

How to pronounce deleterious

  1. Open the pronunciation page — Open the Speakur entry for “deleterious”.
  2. Read the phonetic spelling — Read the IPA spelling (/ˌdɛ.ləˈtɪɹ.i.əs/) so you know which sounds to aim for.
  3. Play the audio — Click Play to hear reference audio for “deleterious”.
  4. Repeat and practice — Say “deleterious” aloud, matching stress and vowels until it feels natural.