The term 'enter slowly' can be broken down into four crossword solutions: SEEP (4 letters), EASEIN (6 letters), SEEPIN (6 letters), and CREEPIN (7 letters). SEEP is an intransitive verb meaning to pass gradually or leak in or out, while EASEIN is a verb meaning to move or go slowly and carefully. SEEPIN is a gerund form of the verb 'SEEP, ' and CREEPIN is a gerund form of the verb 'CREEP, ' which means to move slowly and quietly. All four words describe the action of entering slowly.