IPA: //rəˈzɔːr.i.əl//
KK: /rɛˈzɔrɪəl/
Describing birds that scratch the ground to find food, like chickens.
Chickens are rasorial birds that search for seeds and insects by scratching the soil.
Rasorial is derived from "rasor" (from Latin *rasor*, meaning a scraper or razor) and the suffix "-ial" (meaning relating to). The term refers to birds that are adapted for scratching the ground in search of food, hence relating to the action of scraping.
Think of birds that 'scrape' the ground ('rasor') to find food, and remember that 'rasorial' describes their behavior.