This is the 2075th most frequent Korean word.
실천하는
"Practicing" or "putting into action."
Here, '실천하는' (acting upon, executing) is a present participle describing '사람' (person), characterizing someone who habitually acts.
그는 항상 실천하는 사람이다.
He is always a person who acts upon his words.
'실천하는' acts as a modifier for '것' (thing, act), emphasizing the action itself.
실천하는 것을 두려워하지 마세요.
Don't be afraid to put into practice.
The phrase '실천하는 태도' (attitude of acting) highlights adopting a proactive stance by emphasizing '태도' (attitude) with '실천하는'.