Ge-, bo-, -id-, pra-, -cxj-, -nj-.
The prefix "ge-" signifies "both sexes taken together", as "gepatroj",
parents. "Gefratoj", brothers and sisters. "Geregxoj", king and queen
(the word formed is, of course, always plural).
The prefix "bo-" denotes "relationship by marriage", as "bopatro",
father-in-law; "bofilo", son-in-law.
The suffix "-id-" signifies the "offspring" or "descendant", as "Regxo"
a king; "regxido", a king's son, a prince. "Kato", a cat; "katido", a
kitten. "Sxafo", a sheep; "sxafido", a lamb.
The prefix "pra-" means "of generations ago, great-, grand-", as,
"avo", grandfather; "pra-avo", great-grand-father. It is also used
for descendants, as "pra-nepo", great-grandson. "Praa", primitive or
primeval.
The suffix "-cxj-" is added to men's names and "-nj-" to women's names
to form "pet names", part of the name being left out, as "Petro", Peter
; "Pecxjo", Pete. "Klaro", Clara; "Klanjo", Clarrie. "Pacxjo" (from
"patro"), papa; "panjo", mamma.