Alternative
I believe the answer is "sometimes". Another choice would be "frequently".
"bi" means two. bi does not mean two because then why is bicycle there then 8(
For something to be optional, it means the availability of choice/choices, to have alternatives. The opposite of optional is mandatory, compulsory, required.
Yes, it is a single word. The prefix "bi" means two, and lingual, means "language"
or
Word choice means in writing when your using your six traits in a sentence.
Alternative
No, choice is one syllable.
choice
diction means word choice
arbitrary
One choice is the word peculiar.
Twice is a word that means two.
You can use "or" to indicate a choice between two words in a sentence. For example: "I can have soup or salad for lunch."
One choice is the word ambush.
ekloge means 'choice' or 'option' in English