精せい根こんせいこんじ字FuriganaMeanings1nounenergy; vitality; mental determinationRefers to one's total physical and mental energy, often used in contexts of exhausting or pouring all one's strength into something. Common in set phrases like 精根尽きる (to be completely exhausted) and 精根を傾ける (to devote all one's energy).彼かれは研けん究きゅうに精せい根こんを傾かたむけた。He devoted all his energy to his research.Expressions精せい根こん尽つき果はてるuse up all energy and willpower; be utterly exhausted and lose the will to go on