intenser

adjective
  1. 1

    Strained; tightly drawn.

  2. 2

    Strict, very close or earnest.

    โ€œintense study;ย  intense thoughtโ€

  3. 3

    Extreme in degree; excessive.

  4. 4

    Extreme in size or strength.

  5. 5

    Stressful and tiring.

  6. 6

    Very severe.

  7. 7

    Very emotional or passionate.

    โ€œThe artist was a small, intense man with piercing blue eyes.โ€

Source: https://en.wiktionary.org/wiki/intense, https://en.wiktionary.org/wiki/intenser