27 The noun is an adverbial accusative of manner, explaining the circumstances that inform his evil plans.
28 The word “contention” is from the root דִּין (din); the noun means “strife, contention, quarrel.” The normal plural form is represented by the Qere, and the contracted form by the Kethib.
29 This word is a substantive that is used here as an adverbial accusative—with suddenness, at an instant.

In other versions

with perverted heart devises evil,

continually sowing discord;

therefore calamity will come upon him suddenly;

in a moment he will be broken beyond healing.

who plots evil with deceit in his heart—

he always stirs up conflict.

Therefore disaster will overtake him in an instant;

he will suddenly be destroyed—without remedy.

He always plots evil with perversity in his heart;

he stirs up trouble.

Therefore calamity will strike him suddenly;

he will be shattered instantly, beyond recovery.

Their perverted hearts plot evil,

and they constantly stir up trouble.

But they will be destroyed suddenly,

broken in an instant beyond all hope of healing.

perversion in his heart, he devises evil;

at all times he will send out discord.

Upon such a man, suddenly shall his calamity come;

in a moment he will be damaged and there is no healing.

Frowardness is in his heart,

He deviseth mischief continually;

He soweth discord.

Therefore shall his calamity come suddenly;

Suddenly shall he be broken without remedy.

Public Domain