The word "fine" is correct and usable in written English. You can use it to express agreement, acceptance, or to say that something is satisfactory. For example: "I think that's a fine idea.".
He was fine".
Charles was a fine man, a talented politician, and a loving father to his young son.
"It's a fine line".
Just fine".
That would have been fine.
But a fine human being".
We prefer Muzu or YouTube, but Spotify, SoundCloud or Grooveshark are fine.
Thanks to Ludwig my first paper got accepted! The editor wrote me that my manuscript was well-written
Listya Utami K.
PhD Student in Biology, Bandung Institute of Technology, Indonesia