ا ث ر (Alif-Tha-Ra) arabic root word meaning.

to relate, narrate, recite, choose, propose, transmit, raise, prefer, effect, excite.To stir up, to trump up.Determined/resolved/decided upon a thing.Origin, time/period of life.Dearth, scarcity, drought or sterility.An iron instrument with which the bottom of a camel's foot is marked, or a camel with such a mark.A generous quality/action (e.g. passed down from generation to generation).athar means after, footstep/trace/mark/track/remnant/tradition/teaching, impression/influence, stamp/scar, remains, relics of knowledge transmitted, sunnah, vestige, print, memorial of antiquity. (i.e. that which is left behind from something)