to act on behalf of sb in a responsible position; to act as an agent or proxy; surrogate; (computing) proxy
to substitute; to act on behalf of others; to replace; generation; dynasty; age; period; (historical) era; (geological) eon
texture; grain (of wood); inner essence; intrinsic order; reason; logic; truth; science; natural science (esp. physics); to manage; to pay attention to; to run (affairs); to handle; to put in order; to tidy up