Instill (verb)
To cause a quality to become part of someone’s nature.
“It is important to instill discipline in a child at an early age.”
Instill (verb)
To pour in (medicine, for example) drop by drop.
Instil (verb)
alternative spelling of instill
Wiktionary
Instil (verb)
gradually but firmly establish (an idea or attitude) in a person’s mind
“the standards her parents had instilled into her”
Instil (verb)
put (a substance) into something in the form of liquid drops
“she was told how to instil eye drops”
Oxford Dictionary