تَحْت is the contr. of فَوْق: (Msb, K:) and
التَّحْتُ [signifying The location that is beneath,
below, or under,] is opposed to الفَوْقُ, and is used
in relation to that which is separate from another
thing; الأَسْفَلُ being used in relation to that which
is united with [or a part of] another thing. (Kull.)
Sometimes, (K,) تَحْت is an adv. n., (Msb, K,)
having a vague signification, its meaning not
being clear unless it is prefixed to another word,
as in the phrase هٰذَا تَحْتَ هٰذَا [This is beneath,
below, or under, this]. (Msb.) And sometimes,
it is a simple noun; (K;) in which case, [not
having the article ال,] it is indecl., with dammeh
for its termination, (K, and I'Ak p. 204,) provided that the noun to which it should be prefixed is suppressed, and the meaning of this is
intended to be understood, but not the word itself;
(I'Ak ubi suprà;) as in مِنْ تَحْتُ [Beneath,
below, or under]; (K;) and in the saying,
أَقَبٌ مِنْ تَحْتُ عَرِيضٌ مِنْ عَلُ
[Lean beneath; broad above]: otherwise, it is
decl.; (I'Ak ibid.;) as in تَجْرِي مِنْ تَحْتِهَا الأَنْهَارُ
[Rivers running beneath them]; (Kur ii. 23, &c.;)
i.e., beneath their trees, (Bd, Jel,) and their
pavilions. (Jel.) [You say also, فُلَانٌ تَحْتَ أَمْرِ
فُلَانٍ (assumed tropical:) Such a one is under the command, rule, or
authority, of such a one. And فُلَانٌ تَحْتَهُ فُلَانَةُ
(assumed tropical:) Such a one has as his wife such a woman: see
an ex. in a verse cited voce إِذَا. The dim. is
↓ تُحَيْت: you say, هٰدَا تُحَيْتَ هٰذَا, and مِنْ تُحَيْتِ
هٰذَا, This is a little beneath, below, or under,
this.] ―
2-b2- التَّحْتُ is also the sing. of التُّحُوتُ,
(IAth, TA,) which latter [in the CK erroneously
written التُّحُتُ] signifies The low, base, vile, or
ignoble, persons. (A, IAth, K.) It is said in a
trad., لَا تَقُومُ السَّاعَةُ حَتَّى تَظْهَرَ التُّحُوتُ وَ تَهْلِكَ
الوُعُولُ, i. e. [The hour of resurrection will not
come until] the low, or ignoble, persons [shall
prevail], and the noble persons [shall perish]:
(A, IAth, TA:) or, as some say, until the treasures that are beneath the earth appear. (TA.)
And in another trad. it is said that among the
signs of the resurrection shall be this: أَنْ يَعْلُو
التُّحُوتُ الوُعُولَ That the weak of mankind shall
have ascendency over the strong. (TA.)