kusru -kus- gismu

x1 (person) is cruel/mean/unkind to victim x2.

See also xendo, jursa.

In notes:

xendo
x1 (person) is kind to x2 in actions/behavior x3.
tolke'i
x1 is callous/implacable/heartless/merciless/ruthless towards x2 (person) about x3 (abstraction).