busiest

/B IH1 Z IY0 AH0 S T/
verb
  1. 1

    To make somebody busy or active; to occupy.

    โ€œOn my vacation I'll busy myself with gardening.โ€

  2. 2

    To rush somebody.

adjective
  1. 1

    Crowded with business or activities; having a great deal going on.

    โ€œWe crossed a busy street.โ€

  2. 2

    Engaged in activity or by someone else.

    โ€œHe is busy with piano practice.โ€

  3. 3

    Having a lot going on; complicated or intricate.

    โ€œFlowers, stripes, and checks in the same fabric make for a busy pattern.โ€

  4. 4

    Officious; meddling.

Synonyms

Source: https://en.wiktionary.org/wiki/busiest, https://en.wiktionary.org/wiki/busy