adult
anxious
attention
background
beard
believe
boy
brain
brainy
burnout
business
care
concentrate
concentration
concept
effort
expression
face
fatigue
guy
hands
hard
head
headache
health
idea
intellect
intellectual
intelligence
male
memory
men
meninges
migraine
mind
mindfulness
overwhelmed
pain
problem
reason
reasoning
remember
state of mind
suffer
temples
think
thought
tired
work
worries