Oh my god.
Gentle is not "부드러운"
부드러운 is "soft"
we use the word.. to speak with usually a man's personality.. or just persons.
Gentle.. It is hard to me for explanation. ..um..
For example.
Someone who are gentle.. has a good manner, smile and polite behavior or attitude.
and Many Korean use the word ... same as English..
I dont know If you read korean..
그 남자는 젠틀하다. 그 사람은 젠틀해. (only speaking. we use this word)
gentle = 젠틀
I wish my reply help you :) byebye ~
Some