@some znam derivations

rudh- रुध् + /laT /tip
→ **runadh- रुनध् + /tip by rudhAdibhyazzn...
→ runadh- रुनध् + dhi धि by jhaSastathordh...
→ runaddhi रुनद्धि by jhalAJjazjhaz...
→ ruNaddhi रुणद्धि with /Natvam
→ !**ruNaddhi रुणद्धि "obstructs"

chid- छिद् + /laT /tip
→ **chinad- छिनद् + /tip by rudhAdibhyazzn...
→ chinat- छिनत् + /tip by kharica
→ !**chinatti छिनत्ति "cuts"

/znam loses its a अ before /apit affixes, because of znasorallopaH —

chid- छिद् + /laT /mas
→ **chinad- छिनद् + /mas by rudhAdibhyazzn...
→ chind- छिन्द् + /mas by znasorallopaH
→ !**chindmas छिन्द्मस् "we cut"

rudh- रुध् + /laT /mas
→ **runadh- रुनध् + /mas by rudhAdibhyazzn...
→ rundh- रुन्ध् + /mas by znasorallopaH
→ !**rundhmas रुन्ध्मस् "we obstruct"

chid छिद् + doershowing /zAnac
→ chid छिद् + /znam + Ana आन by rudhAdibhyazzn... rudhAdibhyazzn... because /zAnac is hard
→ chind छिन्द् + Ana आन by znasorallopaH znasorallopaH because /zAnac is /apit
→ !**chindAna- छिन्दानॱ