consolidate
con.sol.i.date \k*n-'sa:l-*-.da-t\ vb [L consolidatus, pp. of consolidare
to make solid, fr. com- +] solidus solid 1: to join together into one whole
: UNITE 2: to make firm or secure : STRENGTHEN {~ the beachhead} 3: to
form into a compact mass : to become consolidated; specif : MERGE
Webster's English Dictionary