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lace someone up
to tie someone's laces; to help someone get dressed in a garment having laces. Would you please lace me up? I can't reach the ties in the back. I laced up Sally, as she requested.
lace something up
to tie the laces of something. Lace your shoes up, Tommy. Lace up your shoes.
1. To fasten shoes or clothing by tightening and tying laces: I laced up my skates before my lesson. We laced our hiking boots up before we headed out.
2. To tighten and tie the laces on someone's shoes or clothing: Come over here so I can lace you up. The assistant laced up the skater before the start of the competition.