mandatory
The opposite of compulsory (compelled) would be voluntary or optional.
For something to be optional, it means the availability of choice/choices, to have alternatives. The opposite of optional is mandatory, compulsory, required.
No part of the writing process is optional.
recommended but optional
For various Universities it means, Pass Second Year Optional.
The opposite of compulsory (compelled) would be voluntary or optional.
For something to be optional, it means the availability of choice/choices, to have alternatives. The opposite of optional is mandatory, compulsory, required.
non-essential,discretionary,optional
Pigs, horses, cows, chickens, cocks, ducks (optional), donkeys (optional), sheep, goats, cats (optional), dogs (optional), bull, bunny (optional), turkey (optional).
no bond is not an optional money. A cheque can be a form of optional money.
no, it is optional
The word problem was optional.
optional recovery number
what is optional recovery number
The math question was optional, but every one did it.
The "mixing center" is optional
it is entirely optional