schalstein /shälˈshtīn/

A slaty diabase tuff

• underflows
• underfong
• underfonged
• underfonging
• underfongs
• underfoot
• underfooted
• underfooting
• underfoots
• underframe
• underframes
• underfulfil
• underfulfilled
• underfulfilling
• underfulfils
• underfund
• underfunded
• underfunding
• underfundings
• underfunds
• underfur
• underfurs
• undergarment
• undergarments
• undergird