to be careful about ~

be careful, watch out / take care

human / person / people / individual / man / woman / someone

Alternative spelling of 気を付けて

a name (word or phrase indicating a particular person, place, class, or thing) / (more specifically) a given name (excluding the surname)

元国: a male given name

specially / particularly, especially

to be concerned about; to be interested in; to be bothered by; to have a problem with

気を付ける: to be careful, to watch out; to take care

Misspelling of きをつけて. Since o is written as を when used as a particle.