knock (something) out

1. to cause something to stop working.

The lightning knocked out our electricity.

2. to destroy something.

Enemy aircraft have knocked out 25 tanks.

• try hand at
• try hand at something
• try it on
• try luck
• try on
• try on for size
• try on something
• try out
• try out for
• try out for something
• try out on
• try out on someone
• try something for size
• try something on for size
• try something out on
• try something out on someone
• try the patience of
• try the patience of someone
• try wings
• try your hand at
• try your hand at something
• try your luck
• try your wings
• tub-thumping
• tucked away