It's a (present progressive) verb.
part of speech
Adjective
What part of speech is thaw
The part of speech for oscillate is verb.
An adjective is a part of speech.
My heart was churning like a tempest in a teacup. Who is churning your butter?
Chewing and mouth movements are part of mechanical digestion.
That would be the stomach.
The part of speech for this particular word is a noun.
part of speech
The part of speech for "answer" is a noun.
what part of speech is beneath
adverb
My stomach was churning after eating that spicy Mexican food.
The part of speech for "explicit" is an adjective.
The part of speech for "lecturer" is a noun.
The part of speech for "rapid" is an adjective.