noun which may take the genitive case particle 'no', noun
asynchronous
Computing term describing operations that do not occur at the same time or are not synchronized with a clock signal. Used as a noun or no-adjective.
Asynchronous communication is a method that does not send data at regular intervals.
This system supports asynchronous processing.
非同期 means 'asynchronous', the direct technical opposite of 同期 ('synchronized') when talking about data or processes.
シンクロ (as a verb する compound) means things move or happen in sync, while 非同期 describes processes that run out of sync or independently, especially in technical/computing contexts.
Compound of 非 (hi, 'non-') and 同期 (dōki, 'synchronization').