cicyspa lujvo

s1=c1 is a weed of species s2.

Cf. cicyspavi'u.

In notes:

cicyspavi'u
v1 weeds out plants s1=c1 of species s2 from v3 with/leaving result/remnant/remainder v4.
degysrasu
s1 is crabgrass/finger-grass (Digitaria) of species s2