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