unit u1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls;

type
  TForm1 = class(TForm)
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
var sl: TStringList;
    i: integer;
begin
    sl := TstringList.create;
    sl.loadFromFile ('portug.exc');
    for i := sl.count-1 downto 0 do
        if pos ('ámento', sl[i]) <> 0 then
             sl.Delete (i);
    sl.saveToFile ('portug.exc');

end;

end.