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general::
Phrase(s): fit together
[for things] to conform in shape to one another. • All the pieces of the puzzle fit together. They really do. • This nut and bolt just don’t fit together., Phrase(s): fit something together
to put the parts of something together. • First you have to fit the pieces together to see if they are all there. • I think I can fit the parts of the model airplane together. • Do you think you can fit together all the parts of the puzzle?
McGrawhill's American Idioms And Phrasal Verbs