The term 'PREFIX WITH PARTICLE' can be solved by two crossword solutions, NANO and ANTI. NANO is a prefix derived from the Greek word for 'DWARF' and is used to describe something that is extremely small in size. It is often used in scientific contexts to refer to particles or objects that are smaller than one billionth of a meter. ANTI is a prefix derived from the Latin word for 'AGAINST' and is used to describe something that is opposed to or counteracts something else. It is often used in scientific contexts to refer to particles or objects that have an opposite effect to another particle or object.