effectiveness

Word parts

effective + -ness

Pronunciation

• IPA ^(key): /ɪˈfɛktɪvnəs/

• Audio (US)

  (file)

• Hyphenation: ef‧fec‧tive‧ness

Noun

Singular effectiveness

Plural effectivenesses

1. (usually singular) The effectiveness of something is defined as how effective it is.

   The effectiveness of this treatment is 75%.

Related words

• effect
• effective