" readily "

1: by choice or preference;

  * e.g., " ... she would readily give up piano lessons for a season ticket at her local ski area "

•  Synonyms : 

•  fain,

•  first,

•  preferably,

•  rather,

•  soon,

•  willingly

•  Antonyms : 

•  involuntarily,

•  unwillingly

2: without difficulty;

  * e.g., " ... always gives directions that are readily understood "

•  Synonyms : 

•  easily,

•  easy,

•  effortlessly,

•  facilely,

•  fluently,

•  freely,

•  handily,

•  hands down,

•  lightly,

•  painlessly,

•  smoothly,

•  well

•  Antonyms : 

•  arduously,

•  hardly,

•  laboriously,

•  strenuously