thirtieth day of the month; thirty days
double circle (indicating "very good" on a piece of school work)
use; utilization; utilisation; application
terminal; computer terminal; information access device (smartphone, tablet, book-reader, etc.); end (e.g. of a roll of film)
link; directory entry; rink
site (usu. website); sight; payable on sight
prior; beforehand; in advance; before the fact; ex ante
contacting; getting in touch; communication; call; message
acknowledgement; acknowledgment; understanding (e.g. "please be understanding of the mess during our renovation"); noting