The affix ṣkan comes in the sense of 'who goes there' after the word patha being in the Accusative -2nd case in construction.,
Of the affix ष्कन्, ष् is for ङीष् 4.1.41, and न् for accent (VI. 1. 197.) As पन्थानं गच्छति = प꣡थिकः fem. पथिकी꣡ ॥,
पथः ष्कन्
Adhyāya 5 · Pāda 1 · Rule 75