blotter
Word family
Synonym discussion
Sense: noun/1
For noun/1, blotter usually means a special desk sheet made to absorb wet ink while also protecting the desk. Blotting paper is the paper material itself, so it can be a small loose sheet and not a full desk item. Desk pad is wider in meaning: it may cover part of a desk for comfort or protection, even if it does not absorb anything. Desk mat is similar to desk pad and is common for modern computer desks, so it often suggests a larger work surface rather than old-fashioned writing. If Ravi dries fresh fountain-pen ink, he needs a blotter or blotting paper. If Mei wants a smooth surface under her keyboard, a desk mat is the better word.
Etymology
Blotter was formed in English from blot plus the ending -er. It first meant something used to blot up wet ink, especially on a writing desk. Later, because short notes were written in such pads or books, the word also came to mean a daily written log, including the police sense.