representation; agency; proxy; deputy; agent; attorney
conversely; on the contrary
bolt from the blue; great surprise
imperfect; incomplete; faulty; defective
attendance; presence; appearance
to keep company; to listen to; to associate with; to play against (e.g. a team); to take on (e.g. a rival)
espionage network; intelligence network
touchstone; Lydian stone; touchstone (e.g. of success); test; litmus test
leaving; going home; quitting one's job; free time; leisure
please take care of yourself; please be careful not to... (concerning one's health or well-being)
important; significant; precious; valuable; careful