at one

phrase
at one \
  • at harmony : in a state of agreement

atone

verb
atone \ ə-ˈtōn \
1574{ds|t|2||}
  • to make amends : to provide or serve as reparation or compensation for something bad or unwelcome —usually + for
  • to make reparation or supply satisfaction for : expiate —used in the passive voice with for
  • reconcile

at leisure

phrase
at leisure \
  • in one's leisure time : at one's convenience

at one's beck and call

phrase
at one's beck and call \
  • ready to obey one's command immediately

at one's door

phrase
at one's door \
  • as a charge against one as being responsible

at one's elbow

phrase
at one's elbow \
  • at one's side

at one's feet

phrase
at one's feet \
  • under one's spell or influence

at one's fingertips

phrase
at one's fingertips \
  • instantly or readily available

at one's wit's end

phrase
at one's wit's end \
  • at a loss for a means of solving a problem

at/in the back of one's mind

idiom
at/in the back of one's mind \
  • in the part of one's mind where thoughts and memories are kept but that are not usually thought about or not perfectly remembered
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