The term 'PART OF IT MAY BE FELT' can be solved by the three-letter word 'PEN'. A PEN is a writing instrument used to apply ink to a surface, usually paper, for writing or drawing. It typically consists of a metal nib or ball, a barrel, and an internal ink reservoir. Pens are used for many purposes, including calligraphy, illustration, and everyday writing. The part of a PEN that may be felt is the nib, which is the metal tip that comes into contact with the paper.