كمن حلف بأنه لا يأتدم.
For example, a person swears not to eat idam, a food accompaniment customarily eaten with bread.
The issue concerns the word yaʾtadim. Idam broadly refers to what accompanies bread, but different foods are not necessarily classified alike across usages and contexts.
To determine whether a particular food is included in the oath, one must examine usage and relevant indicators. Here obscurity concerns the meaning and usage of the word itself, rather than identifying an unusual person outside the expression.