The term 'go through thoroughly' can be summarized by the crossword solution 'SIFT, ' which is a four-letter word. Sifting is a process of separating out fine particles from coarser ones, usually by passing them through a sieve or other device. It is often used in cooking to separate out ingredients such as flour, sugar, and spices. In other contexts, it can also refer to examining something carefully and systematically in order to find something or make a decision.