Derivative of root ידע — canonical: H3045 יָדַע (16 family members).

Concrete and practical knowledge, discernment, or understanding acquired through perception, experience, or instruction. Beyond a general sense of knowledge, דֵּעָה often carries connotations of insight, awareness, and the ability to judge or discriminate correctly; it can refer to intellectual perception or comprehension (especially of divine matters) as well as pragmatic, skill-oriented understanding.