anguish
a state of complicated despair which ruminates over a situation in agony
intimate
known on a personal level to a degree which is secret
potential
the possibilities for development from a current state of being
tactic
a strategy adopted to deal with a specific situation
enigmatic
unreadable; unable to be interpreted by others
confidant
the recipient of someone's secrets and innermost thoughts
a stolen glance
eye contact outside of a situation which calls for a focused gaze, such as a romantic context
hard-hearted
for someone to have a hard heart is for them to exist walled off from anything which would cause emotions to permeate their innermost state; this term is often used situationally
element
the fundamental component of a concept