in_the_least
1. [ adverb ] to any extent at all
Synonyms: even_a_little
Examples:

"are you in the least interested?"

2. [ adverb ] in the slightest degree or in any respect
Synonyms: at_all the_least_bit
Examples:

"Are you at all interested? No, not at all" "was not in the least unfriendly"

Similar spelling:   in_the_lead
  in_the_lurch
  intellect
  in_the_long_run