deriv LSK ETT STT aSTA ALPH OLDHOMEPAGE NEWHOMEPAGE
The nounbase
/rAjan- m "king"
is a masculine that ends in an अन्.
Explained fast, this base has five forms —
**rAjan' राजन्ऽ with /sambuddhi
he rAjan हे राजन्
AsId rAjA nalo nAma आसीद्राजा नलो नाम
rAjAn- राजान् before other strong,
**rAjAnau राजानौ
**rAjAnas राजानस्
rAjJ- राज्ञ् when whimpy, that is, before an affix that starts with vowel or y य्
**rAjJas राज्ञस्
**rAjJA राज्ञा
rAja- राजॱ when /pada, that is, when before no affix,
rAjaputra- राजपुत्रॱ "king-son, prince"
and when before a non-strong non-whimpy affix —
/rAjan- + /su → **rAjasu राजसु
The rAjJ राज्ञ् form comes from deleting the a अ of rAjan राजन्.
Now the exceptions.
Some forms:
As in all masculine an अन् bases, there is an अन् before /sambuddhi,
he हे **rAjan' राजन्ऽ
A आ before the normal /su,
An आन् before the other strongs,
**rAjAnau राजानौ **rAjAnas राजानस्
and elsewhere a अ before consonants
**rAjabhyAm राजभ्याम् **rAjabhis राजभिस्
and n न् before vowels —