(a) Inside (a solid object); immersed, or partly immersed, in (a fluid substance); enclosed in (fire, the air, etc.); (b) into (a solid, liquid, etc.); (c) in or into the surface of (sth.), pierced or……

In phrases with verbs of motion expressed or implied (a) onward to and into (a place, structure, etc.); (b) with verbs implying downward motion: down into (sb., a place); lighten until, of Christ: to……