स्वसृ = सृ + अस् + ऋन्
gather superior - here align - superior pull

स्वसृ =
align person align superior
gather person gather superior
Align person gather superior
align wave align furrow superior
align wave gather superior

रूढ अर्थ
sister - This is error.
Original correct emaning from सृ has to relate to गमॢँ