high-functioning

/HH AY1 F AH0 NG K SH AH0 N IH0 NG/
adjective
  1. 1

    Functioning or operating at a high level.

  2. 2

    (of persons with developmental or intellectual disability or mental illness) Able to function in society; not greatly affected by disability or illness.

  3. 3

    (of persons with autism) Showing relatively high cognitive function.

Source: https://en.wiktionary.org/wiki/high-functioning