complementary
kom-pluh-MEN-tree
/ˌkɒm.plɪˈmɛn.tər.i/
Combining in such a way as to enhance or emphasize the qualities of each other; forming a complete whole.
Describes a relationship between two items or skills where each supplies what the other lacks.
The story behind the word. Formed in the 17th century from 'complement' + '-ary', this adjective originally described mathematical angles that add up to 90 degrees (a complete right angle) before expanding into general aesthetics and interpersonal relationships.
Word relationships
- harmonious: 'Harmonious' implies general agreement, while 'complementary' specifically implies filling mutual gaps.
- supplementary: 'Supplementary' adds extra material, while 'complementary' implies a balanced, mutual fit.
- conflicting: 'Conflicting' items clash, whereas 'complementary' items fit together.
Commonly confused with
- complimentary: 'Complementary' means completion/harmony; 'complimentary' means praising or free of charge.
Word family
- complement (noun/verb): That which completes; to complete.
Collocations
- complementary skills
- complementary colors
- complementary roles
Example sentences
- "The two co-founders had complementary skills: one was a brilliant engineer, while the other was a master marketer." Business management
- "Blue and orange are complementary colors that create striking visual contrast when placed side by side." Art theory
Memory hook
Look at the 'E's: ComplEmentary angles make a complEte right angle. ComplEmentary elements fit together.
When not to use
Do not use to mean free of charge or expressing praise; use 'complimentary'.
Fun facts
- In medicine, 'complementary medicine' refers to non-mainstream practices used alongside standard medical treatments to form a complete care plan.
Related words
Explore more words
interdependent, symbiotic, synergize, synergy, integrate, reciprocal
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