1) Sell 2) To advertise with restraint 3) To sell more cheaply than 4) Undercut 
• (v. t.) To sell the same articles at a lower price than; to sell cheaper than.
[v] - sell cheaper than one`s competition
to sell more cheaply than. · to advertise with restraint; understate the merits of (something): By underselling his product, he let his hearers convince themselves of its importance. · to sell for less than the actual value.