Assail/əˈseɪl/ Definition 1 of 3Pro Tip 1/3Physical attack Use 'assail' for describing aggressive physical confrontations. Knights assailed the castle walls with ladders and siege engines. Pro Tip 2/3Strong action 'Assail' implies forceful action, often sudden and intense. The storm assailed the coastline with fierce winds and rain. Pro Tip 3/3Not just physical While 'assail' can mean a literal attack, it is also used metaphorically. She assailed the problem with a combination of research and creativity.