याच्

(डु)याचृँ = ड उ य आ च ऋ चंद्र बिंदी
Be Ware (डु) connect (य) till/desiring (आ) knot (च) superior(ऋ) net (ञ)
Make curve (डु) connect (य) till/desiring (आ) knot (च) superior(ऋ) net (ञ)

(टु)याचृँ = ट उ य आ च ऋ चंद्र बिंदी
do/use bowl (टु) sinew/tandon (य) till/desiring (आ) knot (च) superior (ऋ) net (ञ)

धातु अर्थ
self reference / circular reference
याच्ञा = याच् + नङ् + टाप्

रूढ अर्थ
beg, ask, plead = in reference to one who has bundled goods/food
offer, tender = in reference to one who has bundled goods/food

Commentary
याच् refers to asking/offering somethingbundled/ to be bundled in a hide.
The following are the most ancient technology manuals. They teach bundling something inside a hide by knot and gaining it back by un-knotting the bundle.

ज ञ = open surface/hide = ज्ञ
य आ (च) ञ - याच
य ज ञ = यज्ञ = The word was already mythified and lost its वर्ण-based meaning by the time texts we have access to were considered worthy of preservation.
The literal meaning of यज्ञ is the connect to wide/opening of skin. BEsides evident spread skin as seat meaning, Skin could mean waterskin and opening could mean mouth of the bottle.

These predate संज्ञा revolution - The time period when the ability to derive compound meanings from compound (समास) of sounds (वर्ण) or expressions (नृत्). This is the evolution phase between the Great Apes and Homo, or early Homo.(Doikika Ethopea, Gona Ethopea, Olduvai Gorge)