Which pen do you want? Here which is a/an—

Select the sentence is which 'down' is an adjective: I have _ interest in the matter . Mr. Rohan is very friendly. Here 'friendly' is- What part of speech is the word manly? 'Frailty, thy name is woman'. Here 'thy' is a/an- Still waters run deep. এখানে Still শব্দটি- Adjective of the word 'trouble' is--- The 'adjective' form of 'contribution' is- "Live is a walking shadow" Here the underlined word is a/an- What is the adjective of 'Laud'?