verb (used with object), hu·man·ized, hu·man·iz·ing. to make humane, kind, or gentle.

What is the British spelling of humanize?

to become human or humane. Also especially British, hu·man·ise .

Is it humanize or humanise?

As verbs the difference between humanise and humanize

is that humanise is while humanize is to make human, to give or cause to have the fundamental properties of a human or humanize can be to make humane.