Related Clues:

• One may be positive that this is the first of the insects
• Might nitre make it still?
• One may be positive that that's the father of all the insects
• Still enough to make nitre with this
• I still rent this
• I rent this still
• Krypton descriptor
• Still, it's like this
• It's still like this
• Finer tin extract that's non-reactive
• Not apt to react
• Like sulfur hexafluoride
• Non-reactive, like some gases
• Chemically comatose
• Disinclined to act in plainer terms