The crossword solution for the term 'FALL CARELESSLY' is PLOP, which is a four-letter word. PLOP is an onomatopoeia, which is a word that imitates or suggests the source of the sound that it describes. It is often used to describe the sound of something falling into water or a heavy object hitting the ground. Therefore, the term 'FALL CARELESSLY' can be summarized as the sound of something dropping without caution.