selfu -sef-se'u- gismu

x1 (agent) serves x2 with service x3 (activity); x1 is a servant (noun) of x2 performing x3.

See also sidju, sarji, gunka.

In notes:

gunka
x1 [person] labors/works on/at x2 [activity] with goal/objective x3.
sarji
x1 supports/holds up/is underpinning of/[helps] x2 against force/opposition x3 with/by means x4.
sidju
x1 helps/assists/aids object/person x2 do/achieve/maintain event/activity x3.
bapse'u
b2=s1 is a slave to b1=s2 in manner/service s3.
ca'irdi'a
j1 is a charge of service j2 to consumer j3=c2 set and levied by authority j4=c1.
dinsefygundi
g1 is a/the industry sector in which s1 provides financial services g2=s3 to s2 by process g3
kibyse'u
x1=k1=s1 is a server on the Internet for a client x2=k1=s2 of service x3=s3.
nolse'u
s1 is a servant of sovereign/aristocrat/noble s2=n1 in culture/country n2 with responsibilities s3.
sefygundi
g1 is a/the industry sector of s1 providing services g2=s3 to s2 by process g3.
selbaise'u
b2=s1 is a slave to b1=s2 in manner/service s3.
selbapselfu
b2=s1 is a slave to b1=s2 in manner/service s3.
selse'u
x1 is served by x2 with service x3 (activity).
se'urbi'o
s1=b1 (agent) volunteers/signs up to serve s2 with service s3 (activity) under conditions b3.
zdase'u
s1 is a house servant in/of house z1 owned by person s2=z2.