my %dict = map {split /\s/,$_,2} <$d>;
close $d;

while (defined (my $line=<$w>)){
  for (split /\s/,$line){
    if (my $meaning = $dict{$_}){
       print "$_: $meaning\n";
       next;
    }
    print "$_ is not in the dictionary\n";
  }
}