Build: What else could 'I' want? Look up, write down and practice saying - 'I want to swim.' 'I want to chop wood.'
Extend: 'Nguwa' (to be unwilling) is another auxiliary verb, eg 'nguwanda tyerrika' (I don't want to stand.) Look up, write down and practice saying 'we don't want to play', 'those two don't want to leave'.