Still can be used as a noun, verb, adjective, or adverb.
The still of the night somehow seemed ominous. (noun)
The police seized the illegal still. (slang noun: alcohol distillation equipment)
His assurances could not still the protests from the miners. (verb)
The still body of a fallen rebel lay over the cannon. (adjective)
The scientists took a video and several still photographs. (adjective)
The rain was still falling the next morning. (adverb)
The igloo was drafty, but it was still better than no shelter at all. (adverb)
Tropical in parts of speech
The word "tropical" can function as an adjective.
a pronoun
Ropnoun
The word him is a pronoun.
Ropnoun
The word him is a pronoun.
The word "appropriate" can function as both an adjective and a verb.
there is one part of speech in the word up.
The part of speech for this particular word is a noun.
The word "trudges" is a verb.
noun