passive
Definitions (4)
1. Not actively participating in an activity by choice, such as a passive or sleeping partner.
2. Substance rendered inactive, inert, or unreactive through passivation.
3. Device (such as transponder) that only reflects a signal, or transmits a signal only upon receiving a command.
4. Component (such as a cable or pipe) or device (such as a heat exchanger or radiator) that has no moving parts and requires no energy input to perform its function.
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