1.b> (); , ; to fret over smth. / ; you have nothing to fret about , ;
2.b> (); , ; it frets me to know that he is unhappy , ; to fret one's life (out) with vain regrets / ; to fret oneself to death ;
3.b> 1) .i> (), ; rust frets metals ; moths fret away clothes / ;
2) (); a river frets out a channel for itself i> ;
4.b> .i> () i> i>;
5.b> i> ();
6.b> (), , ;
fretb> and fumeb> ; to fretb> the / one's / gizzardb> , , .