I'm looking for a better adjective that means focused in the sense of "intense concentration" like an elite warrior in battle. I guess it doesn't even need the sense of having blinders on, more about being "in the zone".
The problem with focused or concentrated (even worse) is that it can apply to too many other things. The word should apply to a person focused on an activity.
It needs to be one word, an adjective, not a noun or verb. Does such a word exist or is focused the best English has to offer?