Dears what word shall be used for saying that two events must not take place at same time? For example to say that two machines in a room must not simultaneously work. One shall run only after other one turned off.
This question appears to be off-topic. The users who voted to close gave this specific reason:
- "Please include the research you’ve done, or consider if your question suits our English Language Learners site better. Questions that can be answered using commonly-available references are off-topic." – Nigel J, Xanne, Hot Licks, Dan Bron, jimm101
If the second machine only ever runs after the first has completed its work you could describe their operation as sequential. Otherwise I think exclusive is the better choice.
I don't think there's a word or stock phrase that unambiguously captures that idea, but you might say that the two machines have mutually exclusive operation: neither can run while the other does.
The two best words for this sentence in my mind are
The two machines must be used non-simultaneously.
The two machines must be used asynchronously.
I’m not sure why moonstar thinks that “asynchronously” requires randomness. Miriam Webster defines it as “not simultaneous or concurrent in time“ and the OED defines it as “Not existing or occurring at the same time.”
“Synchronously” is also a word you can use, and is a synonym for “simultaneously.”
There isn't one single antonym. Depending on the context you may use :
Sequential (if it is one after another)
Asynchronous (if events occur at random points of time)