Which of the following words can be used both as a noun and a verb?

• অপশনে উল্লিখিত শব্দগুলোর মধ্যে -
ক) Epitome (noun)
English Meaning: the typical or highest example of a stated quality, as shown by a particular person or thing
Bangla Meaning: সারসংক্ষেপ; গুণাবলির প্রতীক।
- এর verb form হচ্ছে - epitomize, epitomise - প্রতীক হওয়া; প্রতিনিধিত্ব করা।

• Example sentence: 
- The epitome of a loving mother.
- He epitomes a constant friend.

খ) Harbinger (Noun)
English Meaning: A person or thing that shows that something is going to happen soon, especially something bad:
Bangla Meaning:  অগ্রদূত।

Example sentence:
- The cuckoo is a harbinger of spring.

গ) Counsel (noun/ verb)
English Meaning:
Noun: Advice
Verb: To give advice, especially on social or personal problems
Bangla Meaning:
- উপদেশ; মন্ত্রণা; ব্যারিস্টার।
- উপদেশ দান করা।

• Example sentence: 
- I should have listened to my father's wise counsel. (noun)
- The police have provided experts to counsel local people affected by the tragedy.(verb)

ঘ) Brevity (noun)
English Meaning: Using only a few words or lasting only a short time:
Bangla Meaning: সংক্ষিপ্ততা:

• Example sentence:
- His essays are models of clarity and brevity.
- Brevity is the soul of wit.

• সুতরাং, উল্লিখিত অপশনগুলোর মধ্যে - Counsel can be used both as a noun and a verb.

Source:
1. Accessible Dictionary by Bangla Academy.
2. Oxford Learner's Dictionary.
3. Cambridge Dictionary.