include; encompass; absorb
My new book will subsume all my previous writings on this subject.
sub (under, up to)#sumere (to spend, consume, take) (Latin)
subsume -- sub + sum + e. Sum -- summing. summing something means adding up and hence to include everything. akin to consume i.e. , to take in. sub = something inferior/smaller sume = include i.e. , include something into it = encompass.