Adjective impatient has 2 senses
  1. impatient - restless or short of temper under delay or opposition; "impatient with the slower students"; "impatient of criticism"
    patient, diligent, persevering, enduring, long-suffering, forbearing, longanimous, tolerant, patient of, unhurried
  2. impatient, raring - (usually followed by `to') full of eagerness; "impatient to begin"; "raring to go"
    Antonym: uneager (indirect, via eager)