hot (to the touch) ; passionate (feelings, etc.); ardent; hot (e.g. gaze) ; hot (e.g. temper) ; zealous; enthusiastic; fired up ; intense; severe; extreme ; hot (topic); of interest
to persevere; to persist; to keep at it; to hang on; to hold out; to do one's best ; to insist that; to stick to (one's opinion) ; to remain in a place; to stick to one's post; to refuse to budge