harmful; damaging

happen again periodically or repeatedly

a. happen; take place;

b. (of a thought or idea) come into the mind of;

a. treat or regard (someone) with contempt or disrespect

b. break down or deteriorate chemically

break up into small parts as the result of impact or decay

Relations between the two countries had _____ sharply.

Flooding _______ all rail services across the country.

Some people think that social media has caused

a ________ in academic standards.

Some apps have many _______ uses in that they can enhance even our work skills.

I worried about the _______ if I didn't pass the final exams.