heedless, inattentive, distracted

Confused dreams, from : ضَغَثَ
ضَغَثَ الحَدِيثَ, - He confused, or confounded, [or related in a confused manner,] the tradition, or story, or the like
ضِغْثٌ signifying - a handful of herbs

We shattered, broke i.e. destroyed . from القَصْم means to break

They fled and ran
رَكَضَ Verbal.Noun رَكْضٌ, He moved, or struck with, his leg, or foot: or he struck and hit therewith, like as one strikes and hits therewith a beast. In another ayah : اُرْكُضْ بِرِجْلِكَ
رَكَضَ الرَّجُلُ signifies The man fled, and ran

We made them [as] a harvest [mowed down], extinguished [like a fire].
خَمَدَتِ , Present.T ـُ; and خَمِدَت, Present.T ـَ; Verbal.Noun خُمُودٌ and خَمْدٌ;
The fire subsided; its flaming; or blazing, ceasing; but its embers remaining unextinguished: when its embers have become extinguished, you say of it, هَمَدَت: or it died away, and became utterly extinguished.

It nullifies it, invalidates/refutes. lit. "strikes its brain," disabling or killing it.
دَمَغَةٌ, Present.T ـَ and ـُ Verbal.Noun دَمْغٌ,
He broke his head so that the wound reached the دِمَاغ [or brain]

They do not get tired or fatigued.
حَسَرَ, Present.T ـِ and ـُ Verbal.Noun حَسْرٌ and حُسُورٌ; and احسر ↓ , Verbal.Noun إِحْسَارٌ; and حسّر ↓ , Verbal.Noun تَحْسِيرٌ;
He, and it, tired, fatigued, or jaded, a beast, or a camel: and he drove a camel until he tired, fatigued, or jaded, him.
حُسِرَتِ الدَّابَّةُ The beast was fatigued so that it was left to remain where it was.
حَسَرَ, Present.T ـُ It fatigued the eye. And حُسِرَ البَصَرُ مِنْ طُولِ النَّظَرِ [The eye was fatigued by the length of looking].

They do not slacken
فَتَرَ - slacken, abate, subside
فَتَرَ البَرْدُ The cold abated فَتَرَ المَآءُ [The water abated in heat so as to become tepid, or lukewarm]

Joined together; clogged
رَتَقَ , Present.T ـُ and ـِ Verbal.Noun رَتْقٌ,
He closed up, and repaired, a rent: [he sewed up, or together: see رِتَاقٌ:] الرَّتْقُ is the contr. of الفَتْقُ.
Hence,] one says, رَتَقَ فَتْقَهُمْ, meaning [He closed up the breach that was between them; he reconciled them; or] he reformed, or amended, the circumstances subsisting between them.

We tore them apart.
fatq : tore apart, unstiched, cracked, ripped open

Mountain passes as routes
فَجٌّ A wide road between two mountains; and فُجَاجٌ ↓ signifies the same: or, in a mountain: or, in the anterior part of a mountain, wider than a شِعْب [q. v.]: or a depressed road: or a conspicuous and wide road: or a far-extending beaten track or road

It will dumb found them
بَهَتَهُ, Present.T ـَ Verbal.Noun بَهْتٌ
He, or it, caused him to become confounded, perplexed, or amazed, not seeing his right course: or took him unawares, or by surprise, or unexpectedly, or suddenly