frustration |frəˈstrā sh ən|noun
the feeling of being upset or annoyed, esp. because of inability to change or achieve something
confusion |kənˈfyoō zh ən|noun
1 lack of understanding; uncertainty
• a situation of panic; a breakdown of order
PHRASES mess with someone’s head [informal] cause someone to feel frustrated, anxious, or upset.
PHRASAL VERBS mess around/about :behave in a silly or playful way, esp. so as to cause irritation. -spend time doing something in a pleasantly desultory way, with no definite purpose or serious intent -mess around/about with interfere with -mess up [informal] mishandle a situation -mess someone up [informal] cause someone emotional or psychological problems -inflict violence or injury on someone -mess something up [informal] cause something to be spoiled by inept handling -mess with [informal] meddle or interfere with so as to spoil or cause trouble