1) Add slowly 2) Enter 3) Enter drop by drop 4) Impart 5) Impart gradually 6) Impress 7) Inculcate 8) Infix 9) Infuse slowly 10) Inject 11) Insert 12) Instill 13) Introduce 14) Introduce gradually 1) Encourage 2) Imbue 3) Insert 
To instil or instill is to slowly but firmly establish something. It can also refer to: ...