blend or harmonize;
"This flavor will blend with those in your dish"
"This sofa won't go with the chairs"
cause (something) to be mixed with (something else);
"At this stage of making the cake, blend in the nuts"
- The Internet fills nooks and crannies in our life.
- I desperately tried to fit in my new school.
- The room was painted in harmonious colors.
- The red sofa did not blend with the purple wall.