Question

plucked is a doing word​

Answer 1

Question-

Is plucked a doing word?

Answer-

By "doing word", I conclude you are talking about "Verb". Verbs are of two types -

1. Helping verb- A helping verb (also known as an auxiliary verb) is used with a main verb to help express the main verb's tense, mood, or voice. The main helping verbs are "to be," "to have," and "to do." They appear in the following forms: To Be: am, is, are, was, were, being, been, will be. To Have: has, have, had, having, will have.
2. Main verb- The main verb is also called the lexical verb or the principal verb. This term refers to the important verb in the sentence, the one that typically shows the action or state of being of the subject. Main verbs can stand alone, or they can be used with a helping verb, also called an auxiliary verb.

Plucked is the past form of the word "Pluck". Pluck means to take hold of something or quickly remove it. It is a main verb. So the answer to your question is yes, plucked is a doing word, or rather, plucked is a verb.

Hope you understood.