plantear
point out, raise, propose (regular)
desarollar
develop, flourish (regular)
negociar
negotiate (regular)
deber
must, should (regular)
simbolizar
symbolize
pedir
to ask, want, need (irregular)
invertir
to invest (irregular)
quebrar
to go broke (irregular)
conducir
to drive (irregular)
impulsar
to cause to grow, to encourage (regular)
establecer
to establish