تفسير : (lo! man) i.e. the disbelieving man (is in a state of loss) and torment because of losing his family and position in paradise; it is also said this means: he is in a state of loss because of decrease in his works in old age and its cessation after death,
Jalāl al-Dīn al-Maḥallī
تفسير : verily man (al-insān: the generic) is in [a state of] loss, in all his bargaining,
Sahl al-Tustari
تفسير : verily man is in [a state of] loss,this means: all the days of abū lahab were wasted.