Tark تَركَ can mean to leave/abandon/release with an open probability to get back to something, whereas in the context of the hadeeth, The word Tark تَركَ gives the notion of ceasing to pray, whether that is permanent or willingly temporary.
A related verse that sheds light on the topic of the hadeeth is :
فَخَلَفَ مِن بَعْدِهِمْ خَلْفٌ أَضَاعُوا الصَّلَاةَ وَاتَّبَعُوا
الشَّهَوَاتِ ۖ فَسَوْفَ يَلْقَوْنَ غَيًّا - 19:59
sahih International translation
But there came after them successors who neglected prayer and pursued
desires; so they are going to meet evil -
Yousuf Ali Translation
But after them there followed a posterity who missed prayers and
followed after lusts soon, then, will they face Destruction,-
Allah, exalted He is, eloquently used the term أَضَاعُوا which means originally to lose something... you lose due to negligence, or you lose if you are willingly not paying attention or taking care. I think you can see how this word covers the meaning, which is permanent or willingly temporary.
Tark تَرَكَ in Quran
For your reference, the word Tark تَرَكَ in Quran can be one of three meanings:
To reject/abandon/leave intentionally
وَتَرَكْنَا بَعْضَهُمْ يَوْمَئِذٍ يَمُوجُ فِي بَعْضٍ ۖ وَنُفِخَ فِي
الصُّورِ فَجَمَعْنَاهُمْ جَمْعًا -
18:99 And We will leave them that day surging over each other, and
[then] the Horn will be blown, and We will assemble them in [one]
another example of leaving willingly, on purpose
وَاتْرُكِ الْبَحْرَ رَهْوًا ۖ إِنَّهُمْ جُندٌ مُّغْرَقُونَ - 44:24 And
leave the sea in stillness. Indeed, they are an army to be drowned."
The other meaning that appeared in Quran is to be forced/unwillingly to leave/abandon something
كَمْ تَرَكُوا مِن جَنَّاتٍ وَعُيُونٍ - 44:25 How much they left behind
of gardens and springs
Third Meaning is what a person leaves as inheritance after death
يَسْتَفْتُونَكَ قُلِ اللَّهُ يُفْتِيكُمْ فِي الْكَلَالَةِ ۚ إِنِ
امْرُؤٌ هَلَكَ لَيْسَ لَهُ وَلَدٌ وَلَهُ أُخْتٌ فَلَهَا نِصْفُ مَا
تَرَكَ ۚ وَهُوَ يَرِثُهَا إِن لَّمْ يَكُن لَّهَا وَلَدٌ ۚ فَإِن
كَانَتَا اثْنَتَيْنِ فَلَهُمَا الثُّلُثَانِ مِمَّا تَرَكَ ۚ وَإِن
كَانُوا إِخْوَةً رِّجَالًا وَنِسَاءً فَلِلذَّكَرِ مِثْلُ حَظِّ
الْأُنثَيَيْنِ ۗ يُبَيِّنُ اللَّهُ لَكُمْ أَن تَضِلُّوا ۗ وَاللَّهُ
بِكُلِّ شَيْءٍ عَلِيمٌ - 4:176
They request from you a [legal] ruling. Say, " Allah gives you a
ruling concerning one having neither descendants nor ascendants [as
heirs]." If a man dies, leaving no child but [only] a sister, she will
have half of what he left. And he inherits from her if she [dies and]
has no child. But if there are two sisters [or more], they will have
two-thirds of what he left. If there are both brothers and sisters,
the male will have the share of two females. Allah makes clear to you
[His law], lest you go astray. And Allah is Knowing of all things.
And Allah knows best.