Appendix:Orphaned words

Definition from Wiktionary, a free dictionary

Orphaned words are words that are now rare or obsolete from which commonly used, extant words have been formed, usually by adding a suffix or prefix. They may also be considered roots of the extant words.

Examples are:

Orphaned word	Extant word	True root
defatigable	indefatigable	defatigare
gruntle	disgruntle	unknown
kempt	unkempt	kembed
stroy	destroy	struere
reck	reckless	reccan
ruth	ruthless	unknown
were	werewolf	wer
gress	progress	unknown
gression	progression	gradī