ईश्

ईशँ = इ श चंद्र बिंदी
below/down (on ground) Erect/long
below (referring to on ground) erect (referring to biped posture)

धातु अर्थ
at ऐश्वर्य = self reference = ईश् + वरट् + ष्यञ्

रूढ अर्थ
have power to be able to - “can”
Śiva
English interpretation of “lord” and “master” are incorrect imho.

Comments
चंद्र बिंदी is anatomical addition and does not have meaning.