the.com/synth

means An electronic instrument that generates and shapes sound waves electronically, rather than from vibrating strings or air columns like acoustic instruments.

from A 1970s shortening of 'synthesizer,' itself from the Greek 'synthesis' — 'putting together' (syn- 'together' + tithenai 'to place'). The word originally described chemists combining elements into new compounds; early electronic instrument makers borrowed it because they were doing the same thing with sound — combining oscillators, filters, and waveforms into tones that had never existed in nature.