  Let m,n be positive integers, v a multilinear commutator word and w=v^m. We
prove that if G is an orderable group in which all w-values are n-Engel, then
the verbal subgroup v(G) is locally nilpotent. We also show that in the
particular case where v=x the group G is nilpotent (rather than merely locally
nilpotent).
