IPA: /ˈsɔːfˈhɛdədnəs/
KK: /sɔftˈhɛdɪdnəs/
The state of being easily confused or lacking in intelligence; foolishness.
His softheadedness led him to make poor decisions.
Softheadedness → It is formed from "soft" (from Old English "softe", meaning not hard or firm) and "headedness" (from "head" (from Old English "heafod", meaning the upper part of the body) combined with the suffix "-ness" (meaning the state or quality of). The word describes the state of having a soft or weak mind, lacking in intelligence or firmness of thought.
Think of 'soft' meaning not hard, and 'headedness' referring to the quality of the mind. This helps you remember that 'softheadedness' means a state of having a weak or soft mind.