suffix forming verbs
denoting repeated or continuous action, often of a diminutive nature: twiddle; wriggle; wrestle.
[from Middle English -len, Old English -lian, with similar significance]
1. a suffix of verbs having a frequentative force: dazzle; twinkle.
2. a suffix of adjectives formed orig. on verbal stems and having the sense of “apt to”: brittle.
3. a noun suffix having orig. a diminutive meaning: bramble.
4. a noun suffix indicating agent or instrument: beadle; bridle; thimble.
[Middle English -len, Old English -lian (v.); Middle English -el, Old English -ol (adj.); Middle English -el, Old English -il (diminutive); Middle English -el, Old English -ol, -ul (agent)]