-sa   adj    alone, merely, only
alone    -sa
(to be) kwīherēra
(to do) kwīgūnga
(to spend the night ~) kwīrāza
(I am lonely) mfise irungu
En-En dictionary 
merely    -sa, gusa
En-En dictionary 
only    gusa, nyene
(adj.) -sa
En-En dictionary