Sterable or Steerable: How To spell?
The word Sterable is misspelled against Steerable, an adjective meaning "Capable of being steered; dirigible."
Steerable has double "ee" is mispronounced as "e"Remember double 'EE' in between the strings St & rable which should not be misspelled with single 'E'
Wrong Spelling:  St-e-rable  Correct Spelling:  St-ee-rable 
Explore spell check of Steerable to spell without errors.