Think of 'subsume' as a way to show that one thing is becoming a part of something bigger. Her ideas were quickly subsumed into the project's overall concept.
Pro Tip 2/3
Broad Inclusion
'Subsume' often implies a broad or general category is including smaller, more specific items. All these various flavors are subsumed under the category of ice cream.
Pro Tip 3/3
Implied Loss
Using 'subsume' can suggest that the individual characteristics are lost within the larger group. Independent boutiques were subsumed by the retail giant.