Alvida means Goodbye.
Alvida is an Urdu word.
Alvida has different roots, al is Persian/Arabic while Vida is Sanskrit/Hindi.
Alvida also sounds like German 'auf wiedersehen' (pronounced 'al vee der zane') which also means Goodbye.
I'm suddenly wondering if due to this complexity only somebody wrote 'Kabhi Alvida na Kehna..' (Never say Goodbye).