participle
A verb form used as an adjective. Present participles end in -ing (melting snow). Past participles often end in -ed or -en (frightened cat, frozen lake).
participial phrase
A participle plus the words that go with it, working together as an adjective: Shivering in the wind, we waited for the bus.
gerund
An -ing verb form used as a noun: Skating is fun.
dangling participle
A participial phrase that has no clear word to describe, or seems to describe the wrong word: Walking to school, the snow started.