After a participle ending in kta comes the affix kan when the meaning is something not yet wholly completed.,
The word अत्यन्तगति means an act which has been fully accomplished; अनत्यन्तगति therefore, means, an act which has not been fully accomplished. Thus भिन्न + कन् = भिन्नकः
ot yet wholly divided\ So also छिन्नकः &c.
Why do we say \something not wholly completed\? Observe भिन्नम् \totally divided\, छिन्नम् 'totally cut'.,