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Pronunciation varies by accent · noun
(countable, construction) A void that is deliberately not filled with concrete, so that it can be used to insert something else such as pipework..
Use block out when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Block out means (countable, construction) A void that is deliberately not filled with concrete, so that it can be used to insert something else such as pipework..
Common synonyms include sunblock.
The opposite depends on the specific sense.
Use block out where its definition matches the intended context.
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