Nouns

(n)erosion, eroding, eating away, wearing, wearing away(geology) the mechanical process of wearing or grinding something down (as by particles washing over it), also figuratively
(n)wear, wearingthe act of having on your person as a covering or adornment“she bought it for everyday wear”

Adjectives

(s)exhausting, tiring, wearing, wearyingproducing exhaustion“an exhausting march”, “the visit was especially wearing”