Nuh Verse 22

and who have devised a tremendous plot,

They have contrived a mighty plot,

and have devised a mighty device

who have made a grand plan,

And who have plotted a tremendous plot

"And they have devised a tremendous Plot.

They contrived a plot of great magnitude.

And they contrived a plot of great magnitude,

“And they carried out a very sinister scheme.”

and they have devised an outrageous plot.

"And they have made tremendous schemes (to prevent my call and people’s acceptance of it).

They have devised a mighty and heinous plan (against the Prophet),

And they cheated/deceived , a great/magnified cheatery/deceit .

“And they carried out a very sinister scheme.”

"And they devised a mighty plot.

"And they have plotted a mighty plot.

And indeed they have led many astray. And increase Thou the wrongdoers in naught but perdition.

And they have planned a very great plan.

And they have plotted a mighty plot,

They have arrogantly plotted evil plans against me,

they have devised a mighty plot,

"And they have plotted a mighty plot."

and they have hatched a mighty plot,

And they schemed outrageous schemes.

And they have devised, namely, the leaders, a mighty plot, extremely outrageous, by denying Noah and harming him as well as his followers,

And they have plotted a mighty plot.

is that they plotted a deceptive plot for their followers tricking them into believing that they were following the truth and correct guidance.

This is like what they will say to them on the Day of Judgement,

بَلْ مَكْرُ الَّيْلِ وَالنَّهَارِ إِذْ تَأْمُرُونَنَأ أَن نَّكْفُرَ بِاللَّهِ وَنَجْعَلَ لَهُ أَندَاداً

Nay, but it was your plotting by night and day;when you ordered us to disbelieve in Allah and set up rivals to Him! (34;33)

For this reason He says here,
The Idols of the People of Nuh and what happened to Him

وَمَكَرُوا مَكْرًا كُبَّارًا

وَقَالُوا لَا تَذَرُنَّ الِهَتَكُمْ وَلَا تَذَرُنَّ وَدًّا وَلَا سُوَاعًا وَلَا يَغُوثَ وَيَعُوقَ وَنَسْرًا