sraku -rak- gismu

x₁ [abrasive/cutting/scratching object/implement] scratches/[carves]/erodes/cuts [into] x₂.

(cf. guska, katna, mosra, plixa, kakpa (unlike kakpa, sraku does not imply material is removed), spali)

In notes:

guska: x₁ blade/scraper/erosive scrapes/erodes/abrades x₂ from x₃.
kakpa: x₁ (agent) digs x₂ [material] up/out of x₃ [source/hole] with limbs/tool(s) x₄.
katna: x₁ (tool/blade/force) cuts [through]/splits/divides x₂ (object) into pieces x₃.
mosra: x₁ is friction [force opposing motion] due to contact/rubbing between x₂ and x₃; (fe) x₂ rubs x₃.
plixa: x₁ (agent) plows/furrows/tills [cuts into and turns up] x₂ with tool x₃ propelled by x₄.
spali: x₁ (agent) polishes object/surface x₂ with polish x₃, applied using tool x₄.
laryrakpra: c₁ sculpts/carves c₂=l₁ from s₂ using tool s₁
rakci'a: c₁ carves inscription/text c₂ on to c₃=s₂ using c₄=s₁.