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