For continuing actions or states:
* toujours - This is the most common and general way to say "still."
* encore - This means "still" in the sense of "yet" or "already."
* continuer - This means "to continue" and can be used to express that something is still happening.
For stillness or calmness:
* immobile - This means "motionless" or "still."
* tranquille - This means "calm" or "peaceful."
* silencieux - This means "silent" or "quiet."
Examples:
* Il est toujours là. (He is still there.)
* J'ai encore faim. (I am still hungry.)
* La musique continue. (The music is still playing.)
* Elle est immobile. (She is motionless.)
* L'atmosphère est tranquille. (The atmosphere is calm.)
* La pièce est silencieuse. (The room is quiet.)
The best translation will depend on the specific context of your sentence.