Question

make a meaningful sentence by using the phrase to sink in

Answer 1

She moved to the sink and turned on the water. 

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Answer 2

The meaningful sentence by using the phrase to sink in is following - How many times do I have to tell you something before it sinks in?

Sink in indicates to be fully understood or realised.

Sink in is a phrasal verb.

The phrasal verb is the kind of verb which is composed of main verb with the adverb or the preposition.