The term 'HOLD IN' can be defined by the following crossword solutions: CONSTRAIN (9 letters), CHECK (5 letters), INHIBIT (7 letters), REIN (4 letters), ESCROW (6 letters), RETAIN (6 letters), and REPRESS (7 letters). Each of these words describes an action that involves keeping something in a certain state or condition. CONSTRAIN means to restrict or limit, CHECK means to restrain or stop, INHIBIT means to prevent or prohibit, REIN means to control or guide, ESCROW means to hold in trust, RETAIN means to keep or maintain, and REPRESS means to restrain or suppress. All of these words are related to the idea of holding something in, whether it be a physical object, an emotion, or an idea.