The term 'beginning on' can be expressed in four different ways: ONSET (5 letters), SINCE (5 letters), asof (4 letters), and eversince (9 letters). ONSET is a noun that refers to the start or commencement of something. SINCE is an adverb that indicates a point in time from which something has been continuing up until now. Asof is an adverb that means from a particular point in time. Eversince is an adverb that means from a certain point in time until now.