Al-'Adiyat Verse 6

Surely humankind is ungrateful to their Lord—

indeed, man is very ungrateful to his Lord –

Surely Man is ungrateful to his Lord,

man is ungrateful to his Lord––

Verily man is Unto his Lord ungrateful.

Truly man is, to his Lord, ungrateful;

Verily man is most ungrateful to his Lord;

That man is ungrateful to his Lord

Indeed man is very ungrateful towards his Lord.

Indeed man is ungrateful to his Lord,

Surely human is ungrateful to his Lord;

That ( good for nothing) human being is indeed very ungrateful to his Lord.

That truly the human/mankind (is) ungrateful/disobedient (E) to his Lord.

Indeed man is very ungrateful towards his Lord.

Verily, man is to his Lord ungrateful;

Verily! Man (disbeliever) is ungrateful to his Lord;

And surely he is a witness of that.

Most surely man is ungrateful to his Lord.

Lo! man is an ingrate unto his Lord

The human being is certainly ungrateful to his Lord.

Indeed, the human is ungrateful to his Lord.

Verily, man is ungrateful to his Lord.

surely, man is ungrateful to his Lord.

Indeed, the human being is ungrateful to his Lord.

Verily man, the disbeliever, is ungrateful to his Lord, thankless, denying [the reality of] His graces, exalted be He,

Verily, man is ungrateful
لَكَنُودٌ
(Kanud) to his Lord.

This is the subject what is being sworn about, and it means that he (man) is ungrateful for the favors of His Lord and he rejects them.

Ibn Abbas, Mujahid, Ibrahim An-Nakhai, Abu Al-Jawza, Abu Al-Aliyah, Abu Ad-Duha, Sa`id bin Jubayr, Muhammad bin Qays, Ad-Dahhak, Al-Hasan, Qatadah, Ar-Rabi` bin Anas and Ibn Zayd all said,

"
لَكَنُودٌ
Al-Kanud means ungrateful."

Al-Hasan said,

"
لَكَنُودٌAl-Kanud is the one who counts the calamities (that befall him) and he forgets Allah's favors."

Concerning Allah's statement,

وَإِنَّهُ عَلَى ذَلِكَ لَشَهِيدٌ