to be soaked in; to be flooded; to be submerged / to be immersed in (joy, memories, alcohol, etc.); to give oneself over to; to bask in

完全: completeness; perfection / 敢然: boldness / 間然: being liable to criticism

ambush (a disposition or arrangement of troops for attacking an enemy unexpectedly from a concealed station)

(sciences) toxicology