ārdruka

 The standard Devanagari spelling of ārdruka is आर्द्रुक

The Sanskrit word ārdruka means “moist, wet, damp,” and is a derivative 

adjective formed from the root ārdra (“wet, fresh, moist”).

Core meaning

• ārdruka is an adjective meaning moist, damp, or slightly wet, derived from
• ārdra (“wet, fresh, tender”).
• It appears in classical Sanskrit as a descriptive term for substances, plants,
• or materials that possess moisture or softness.

Etymology and formation

• ārdra = “wet, moist, fresh, tender.”
• The suffix ‑ka forms a diminutive or derivative adjective.
• Thus ārdruka literally means “somewhat moist” or “having the quality of moisture.”

Distinguishing it from similar words

A common point of confusion is with ārdraka, which means “fresh ginger” in Sanskrit.

• ārdruka = “moist, damp.”
• ārdraka = “ginger.”

These are separate words with different suffixes and meanings.

On the web results

The supplied results point to general Sanskrit dictionary portals

(e.g., Lexilogos

LEXILOGOS

, Shlokam

Shlokam

, 

SanskritDictionary.org

Sanskrit Dictionary

) but none of them provide

the definition of ārdruka in the snippets shown. The meaning

above is therefore based on standard Sanskrit lexical knowledge.