anuṣṭhā

 The Sanskrit term "anuṣṭhā" generally means 'performance', 'practice', or 'carrying out' of a prescribed act or ritual, and it derives from the root verb "ṛćh" via the causative form "anu- + ṣṭhā", signifying thorough or proper execution.

Meaning

In classical Sanskrit, "anuṣṭhā" refers to the performance or observance

of an act, particularly one that is formal, ritualistic, or disciplined.

It is commonly used to denote:

• The carrying out of Vedic rituals or ceremonies
• Religious observances or duties performed methodically
• Spiritual practices or disciplines (e.g., meditation, japa, vrata)

The term emphasizes habitual, disciplined, or prescribed action carried

through faithfully, reflecting both the action itself and the devotional 

or ethical attitude in its performance. In philosophical contexts,

"anuṣṭhā" can denote the regular observance of spiritual disciplines

leading to virtue or progress on the path of dharma.

Etymology

"anuṣṭhā" is a nominal form derived from the Sanskrit root "sthā" 

(to stand, to place, to establish) prefixed by "anu-", which usually 

conveys succession, adherence, or following. The basic construction is:

• anu-: following, in accordance with, successive
• ṣṭhā (from sthā) : to stand, establish, or place

Thus, "anuṣṭhā" literally carries the sense of "that which is properly

established or executed according to rules or sequence". Some

lexicographers treat it as a shortened form of "anuṣṭhāna", which 

maintains the same meaning but often refers to the broader context 

of religious or ritual observances.

Usage Example

In Vedic literature or dharmasastra texts, one might encounter: 
“sa yajñaṁ anuṣṭhāti”, meaning "he performs the sacrifice" or
"he carries out the ritual."

In philosophical texts, one might see "anuṣṭhā of yoga" indicating

regular practice or discipline in yoga.

In summary, "anuṣṭhā" encapsulates the idea of performing an action 

properly, methodically, and in accordance with established norms, 

both in mundane and spiritual contexts, and its roots reflect the notions 

of standing, sustaining, and following a prescribed path.