rejoice    kunēzērwa
(at arrival of someone) gukēra
(in another's troubles) gukēkeza
(in coming of another) kwigina, gusāsīrira
En-En dictionary 
gukēra (-kēreye)     v    1. to rejoice at arrival of someone, 2. give warm welcome (one does not say it of himself)
gukēkeza (-kēkejeje)     v    1. to torment, 2. to deceive, 3. to rejoice in another's troubles
arrival    (premature) igicuri
(to rejoice at ~, of one) gukēra
En-En dictionary 
kwīgina (-īginnye)     v    1. to rejoice in coming of another, 2. be very happy
kwīginira (-īginiye)     v    to rejoice over
gusāsīrira (-sāsīriye)     v    to rejoice in the coming of another
kwīginana (-īginanye)     v    to rejoice together, in each other