1 to screen

2 to block (sth or sb)

3 to shield

4 (protective) shield

1 to conceal

2 to hide behind

3 to cover up

1 to cover up

2 to conceal

3 to mask

4 to gloss over

1 to cover up

2 to close

3 to surprise

1 to bury

1 one word says it all (idiom, from Analects); to cut a long story short

2 in a nutshell

1 counter soldiers with arms, water with an earth weir (idiom); different situations call for different action

2 to adopt measures appropriate to the actual situation

1 to fool people (idiom)

2 to pull the wool over people's eyes

1 lit. to cover one's ears whilst stealing a bell

2 to deceive oneself

3 to bury one's head in the sand (idiom)

1 to bury one's head in one's hands and weep (idiom)