The term ASSEMBLE AGAIN can be broken down into three crossword solutions: REBUILD (7 letters), REGATHER (8 letters), and RESIT (5 letters). REBUILD means to construct something again, usually after it has been damaged or destroyed. REGATHER means to gather together again, often after being scattered or separated. RESIT means to sit for an exam again, usually after having failed it the first time. All three words imply that something is being done again, which is the main idea behind the term ASSEMBLE AGAIN.