to retreat - a) to go back or backward; to withdraw in the face of opposition or from a dangerous or unpleasant situation; b) to withdraw to a safe or private place.

to collapse; to break down suddenly; to give way.

to hide oneself.

to draw inwards.

to become smaller or contract as from fear, heat, etc.

to go back or retreat from fear or lack of confidence.

to go or come in; to enter into.

the liquid part of a fruit or vegetable.

that which makes something what it is; the intrinsic, fundamental nature or most important quality (of something); essential being.

a kind of herb.

to go in; to enter into.