30th day of the month; 30 days
double circle (indicating "very good" on a piece of school work)
regarding ...; concerning ...; about ...; on ...; with respect to ...; in regard to ...
terminal; computer terminal; information access device (smartphone, tablet, book-reader, etc.); end (e.g. of a roll of film)
link; linking; link; hyperlink; linking (of object files); linkage
contacting; getting in touch; communication; call; message
deletion; elimination; erasure; striking out
to be; to come; to go; to be (doing)
acknowledgement; acknowledgment; understanding; approval; consent