English
Blend of what's up + app, coined as a trademark.
Latin applicātiō ‘application’
Old French aplicacion ‘application’
Middle English applicacioun
English application
English app
The story
Blend of what's up + app, coined as a trademark.
Today it means
name An instant messaging service founded in 2009 and acquired by Facebook in 2014.
Language periods are conventional ranges, not dates for this word.
Etymograph / WhatsApp