pinfu -pif- gismu

x1 is a prisoner/captive of x2, restrained/held/confined by means/force x3.

See also zifre, kavbu, rinju, ralte, fanta, cilce.

In notes:

cilce
(adjective:) x1 is wild/untamed.
fanta
x1 prevents/keeps/stops/restrains/constrains event x2 from occurring.
kavbu
x1 captures/catches/apprehends/seizes/nabs x2 with trap/restraint x3.
ralte
x1 retains/keeps/holds x2 in its possession.
rinju
x1 is restrained/held [back]/constrained/kept by restraint x2 against x3 (event).
zifre
x1 is free/at liberty to do/be x2 (event/state) under conditions x3.
cajypinfu
x1 is a hostage of / is held hostage by x2
crogle
g1 practices sadomasochism with g2=c1 with pain at locus c2.
pifmanfyta'u
t1=m1 is a prison uniform for wearing by t2=p1 for purpose t3
pifygau
g1 takes into custody/imprisons p1 as a prisoner/captive of p2 restrained/held/confined by means/force p3.
selkarlygau
g1 collars/has a band put on k2, the collar/band being k1 made of material k3.