fissile /fisˈīl or -il/

1. Readily split
2. Capable of nuclear fission

• put on a pedestal
• put one over on
• put one's back into
• put one's best foot forward
• put one's bib in
• put one's face on
• put one's feet up
• put one's finger on
• put one's foot down
• put one's foot in it
• put one's foot wrong
• put one's hand to
• put one's hand to the plough
• put one's head in a noose
• put one's head on the block
• put one's house in order
• put one's mind to
• put one's money where one's mouth is
• put one's oar in
• put one's shirt on
• put one's shoulder to the wheel
• Putonghua
• put on her mettle
• put on his mettle
• put on ice