As nouns the difference between xis and bis
is that xis is while bis is b-sharp.
xis
English
Noun
(head)
Anagrams
* (l)
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bis
English
Etymology 1
Noun
(head)
Etymology 2
(etyl) .
Adverb
(-)
Twice; showing that something is, or is to be, repeated, such as a passage of music, or an item in accounts.
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