Regarding the ayah:
وَإِذْ قِيلَ لَهُمُ اسْكُنُوا هَٰذِهِ الْقَرْيَةَ وَكُلُوا مِنْهَا حَيْثُ شِئْتُمْ وَقُولُوا حِطَّةٌ وَادْخُلُوا الْبَابَ سُجَّدًا نَّغْفِرْ لَكُمْ خَطِيئَاتِكُمْ سَنَزِيدُ الْمُحْسِنِينَ
Some translations (sourced from Islam Awakened) are:
And remember it was said to them: "Dwell in this town and eat therein as ye wish, but say the word of humility and enter the gate in a posture of humility: We shall forgive you your faults; We shall increase (the portion of) those who do good."
-- Yusuf Ali (Saudi Rev. 1985)
And [mention, O Muhammad], when it was said to them, "Dwell in this city and eat from it wherever you will and say, 'Relieve us of our burdens,' and enter the gate bowing humbly; We will [then] forgive you your sins. We will increase the doers of good [in goodness and reward]."
-- Sahih International
And (remember) when it was said to them: “Reside in this town and eat from there whatever you wish, and say: ‘(O Allah) forgives our sins,’ and enter the gate prostrating (bowing with humility). We shall forgive you your sins. We shall increase (reward for) the righteous people.”
-- Abdul Hye
I'm a bit puzzled as to why there's multiple, somewhat different translations of the part highlighted in bold.
Question: In Qur'an 7:161, why is "say the word of humility" translated in various ways?
The main relevant Arabic word seems to be حطة (ḥiṭṭa) = "alleviate". I'm not sure how this translates.