synthesize

UK: /ˈsɪnθɪsaɪz/ US: /ˈsɪnθəˌsaɪz/ ,(sin′thə sīz′)

Inflections of 'synthesize' (v): (⇒ conjugate)

synthesizes

v 3rd person singular (US & UK)

synthesizing

v pres p (US & UK)

synthesized

v past (US & UK)

synthesized

v past p (US & UK)

WordReference Random House Learner's Dictionary of American English © 2025

syn•the•size /ˈsɪnθəˌsaɪz/   v. [~ + object] , -sized, -siz•ing. 

1. to make or form (something) into a synthesis:
   Doctors and scientists worked to synthesize a drug similar to the one produced naturally by certain South American plants.
2. to make (sounds) by a special machine or synthesizer.

See syn-, -thes-.

WordReference Random House Unabridged Dictionary of American English © 2025

syn•the•size  (sin′thə sīz′), v., -sized, -siz•ing. 
v.t. 

1. to form (a material or abstract entity) by combining parts or elements (opposed to analyze):
   to synthesize a statement.
2. Chemistry to combine (constituent elements) into a single or unified entity.
3. to treat synthetically.

v.i. 

4. to make or form a synthesis.

Also, synthetize*  [esp. Brit.,] syn′the•sise′. 

• synthes(is) + -ize 1820–30

syn′the•si•za′tion, n. 

Collins Concise English Dictionary © HarperCollins Publishers::

synthesize / ˈsɪnθɪˌsaɪz/, synthetize, synthesise, synthetise verb

1. to combine or cause to combine into a whole
2. (transitive) to produce by synthesis

ˌsynthesiˈzation, ˌsynthetiˈzation, ˌsynthesiˈsation, ˌsynthetiˈsation noun