Where does “riper” come from?

riper (Middle English) comes from Old English rīpere, from Old English -ere, from Proto-West Germanic -ārī, from Proto-Germanic -ārijaz, from Latin -ārius, from Proto-Italic *-āzios — Forms relational adjectives to nouns (and rarely numerals).

Ancestry of “riper”, step by step

Step	Language	Word	Meaning
1	Old English	rīpere	reaper
2	Old English	-ere	masculine agent suffix, originally applied only...
3	Proto-West Germanic	-ārī	-er
4	Proto-Germanic	-ārijaz	-er
5	Latin	-ārius	er
6	Proto-Italic	*-āzios	Forms relational adjectives to nouns (and rarely numerals)

Every word from Proto-Italic *-āzios →Every word from Latin -ārius →Every word from Old English -ere →