धातु - dhātu

W. D. Whitney, The roots



√1 i, ī, ay, ‘go’

Pres. [2.] éti yánti etc. v.+  , ité yante etc. b.+ [1.] áyate etc. v.+ , ayati etc. av1 — [4.] īyate etc. v.b.c.  [5.] see √2 i, — iye rv1 iyāte rv1. ī́mahe v.b. , iyāná v.+ , íyati rv1. , iyánt śb.m. (imi ta1. ; āitat av1. ; yan rv1. ; īyāná rv1. ; īyámāna śb. ; īmahi c. )
Perf. iyā́ya īyús etc. v.+ [iyayitha], (iyétha vb. , iyátha v. ) -ayāṁ cakre e.+
Aor. 1. īyāt etc. v.+ (iyāsam ggs. ) — [4. (adhy-) āiṣṭa. 5. āyiṣṭa.]
Fut. 1. eṣyáti etc. av.+ , -te etc. b.+ ; ayiṣyati etc. b.+  — 2. etā́ etc. b.+
Verb. itá v.+ ; īta c. , étum b.+ ; étave étavāí vb. , étos v.b.s. ; itvā́ b.u. ; -ítya v.+ ; -īya c. ; -áyya b. ; áyase, ityāí, iyádhyāi rv. ; -ā́yam v.b. 
Sec. Conj.: Pass. īyáte . c. Int. īyāyate pu1. [Desid. ayiyiṣate, iyiṣati. —] Caus., (praty-) āyayati etc. (-āyyate) c. ; (adhy) āpayati -te etc. ta.e.+  āpipat.
Deriv.:

áya v.+  -it b.+ -etu rv. āpaka c.
ayátha rv.s. íti v.+  etavyà b.+ -āpya c.
áyana v.+ ití v.b. etṛ v.+ -āpana e.+
-āya v.+ -itya b.s. éma vs. āpayitṛ c.
-āyin av.+ ityā́ v.b. éman rv.  
-āyana av.u. -ítvan v. -eya e.+ -āyaka c.
āyú v.+ itvará rv.c. éva v.b. -āyana e.
ā́yu v.+ -itha rv.   -āyitavya c.
ā́yus v.+ īti e.+    
-āyuka b. īya- rv.    


The last three derivatives only with prati; the four preceding, only with adhi.
The forms distinctly calling for the admission of a root-form ī are, in the older language, ī́mahe v.b. (common in rv.), īyām and īyāta and īyus b.u., īyāná sv. (all single occurrences); in the later language, -īta, īti, -īya (all rare or sporadic). The present-stem ī́ya is improperly called intensive.
————————————————————————

2 i, inv, in, ‘send’

Pres. [5.] inóti etc. (invire) rv. — [1.] ínvati etc. v. [9.] inīmasi **? etc. sv1.
Verb. **-inita
śb.

Deriv.:

iná rv.c.  -inva v.b. invaká b.+ énas v.+
       



————————————————————————

iñg ‘stir’

Pres. [1.] iñgati -te ** e.+
Verb. **iñgita
e.+ 
Sec. Conj.: Caus., iñgáyati etc. v.+ ; (iñgyáte śb. )

Deriv.:

iñga e.+  iñgana s.+ iñgya c. iñjanā c.
       


Isolated forms as if from īñg, iñk, iñj are found in the brāhmaṇas.
————————————————————————

ich see √1 iṣ.

————————————————————————

iṭ.
A root iṭ ‘wander’, is assumed by BR. on account of the proper name i†ant in kb.  and the doubtful and obscure iṭátas at rv.x.171.1  — which latter, however, is shown by its accent to be no participle.
————————————————————————

iḍ.
A root iḍ is perhaps to be assumed on account of the nouns íḍ v.+  and íḍā v.+ 
————————————————————————

√idh, indh, ‘kindle’

Pres. [1.] inddhé indháte etc. v.+  (indhaté rv. , índhāna v. , iñkṣva ab. , inttām ta. )
Perf. īdhé īdhiré rv.śb.  [— indhāṁ cakre.]
Aor. 1. idhaté ? rv.1 idhīmahi v. , idhāná v. — 5. āindhiṣṭa etc. b. , indhiṣīya ts. , indhiṣīmahi s.
Fut. 1. indhiśyant s. , [— 2. indhitā]
Verb. iddhá v.+ ; -idhya s.+ , ídham, -ídhe rv. 
Sec. Conj.: Pass. idyáte etc. v.+  [— Desid. indidhiṣa-.] — Caus., indhita c. 
Deriv.:

-idh v.+  -ídhya ts. édha v.+ índha vb.
-iddhi b. -idhra ? v.+  édhas av.+ -indhaka e.
idhmá v.+   -eddhṛ rv. indhana v.+


————————————————————————

in, inv, see √2 i.

————————————————————————

inakṣ see √2 naś.

————————————————————————

iyakṣ see √ yaj.

————————————————————————

irajy see √ ṛj.

————————————————————————

iradh see √rādh.

————————————————————————

il ‘be quiet’

Pres. [6.] ilati etc. c.
[Perf. etc. iyela, āilīt, eliṣyati, elitā]
Sec. Conj.: Caus., iláyati etc. av.b.s.  (āilayīt av. ; ilitá śb. )

Deriv.: -ilaya b.s.
In ts. īláyanti is once read.
————————————————————————

√1 iṣ, ich, ‘seek, desire’

Pres. [1.] icháti -te etc. v.+ -eṣati -te etc. e.+ , [6.] -iṣa -iṣant e.+ — [4.] -iṣyati e.+ 
Perf. iyeṣa īṣús, īṣe īṣire etc. b.+ 
Aor. [3. āiṣiṣat. **—] 5. **āiṣīt āiṣiṣus etc. b.u. , </span>
Fut. 1. eṣiṣyati etc. b. , -te b. [— 2. eṣita, eṣṭā.]
Verb. iṣṭá v.+ ; éṣṭum b.+ , -ṭavāí śb. , eṣitum r. ; [iṣitvā, iṣṭvā;]
Sec. Conj.: Pass. iṣyate etc. e.+ , -ti e.  [— Des. eṣiṣiṣa-.] — Caus., eṣaya-ti etc. eṣita c.  etc. , (ichayāmi r1.
Deriv.:

-ichaka e.+  iṣirá vb. -eṣaka e. éṣaṇā b.+
ichā e.+ iṣṭí v.b.  eṣin av.+ eṣaṇīya c.
ichu s.+ iṣmín rv. -eṣya ab. eṣṭavyá b.+
íṣ v.b. éṣa v.+ eṣyá v.+ eṣitavya c.
iṣa rv. eṣá rv. éṣaṇa v.+ eṣṭṛ e.
iṣí v.      


Compare the roots 2 iṣ and īṣ, eṣ. The present-stems eṣa, iṣa, iṣya only later, unusual, and with ceratain prepositions.
————————————————————————

√2 iṣ, ‘send’

Pres. [9.] iṣṇā́ti etc. (iṣāṇa) v.b.s.  — [4.] -íṣyati -te etc. v.+ , [6.] -iṣe etc. rv. 
Perf. īṣáthus īṣus rv.  īṣiré av.
Aor. 5. prāiṣīt. ** e.+ , (aprāiṣīt** * m. )
[Fut. eṣiṣyati, eṣitā.]
Verb. iṣiṭá v.+ ; [iṣitvā;] -íṣya b.+ , éṣam b. ; iṣádhyāi rv.
Sec. Conj.: [— Des. eṣiṣiṣa-.] — Caus., iṣáyati -te etc. (iṣayádhyāi rv. ) — eṣayati -te etc. e.+  (eṣyate etc. e.  )
Deriv.:

iṣáṇi rv.  -eṣa v.+ -eṣya b.+ eṣitavya b.c.
íṣu v.+ eṣaka e.  eṣaṇa e.+ eṣayitṛ e.


Doubtless the same with √1 iṣ, with causative meaning. In later language, almost only preṣaya. The derivatives hardly occur except withj pra.
————————————————————————