The term 'NARROW SHARD' can be broken down into two words: 'NARROW' and 'SHARD'. 'NARROW' is an adjective meaning 'not wide', while 'SHARD' is a noun referring to a piece of broken glass or pottery. Together, the term 'NARROW SHARD' can refer to a thin, sharp fragment of glass or pottery. The term can also be used figuratively to describe something that is thin and sharp. The crossword solution for this term is 'SLIVER', which is a synonym for 'SHARD'.