strictest

/S T R IH1 K T AH0 S T/
adjective
  1. 1

    Strained; drawn close; tight.

    โ€œstrict embraceโ€

  2. 2

    Tense; not relaxed.

    โ€œstrict fiberโ€

  3. 3

    Exact; accurate; precise; rigorously particular.

    โ€œto keep strict watchโ€

  4. 4

    Governed or governing by exact rules; observing exact rules; severe; rigorous.

    โ€œvery strict in observing the Sabbathโ€

  5. 5

    Rigidly interpreted; exactly limited; confined; restricted.

    โ€œto understand words in a strict senseโ€

  6. 6

    Upright, or straight and narrow; โ€” said of the shape of the plants or their flower clusters.

  7. 7

    Severe in discipline.

    โ€œIt was a very strict lesson.โ€

  8. 8

    Irreflexive; if the described object is defined to be reflexive, that condition is overridden and replaced with irreflexive.

Source: https://en.wiktionary.org/wiki/strict, https://en.wiktionary.org/wiki/strictest