thornier

/TH AO1 R N IY0 ER0/
adjective
  1. 1

    Having thorns or spines

  2. 2

    Troublesome or vexatious

  3. 3

    Aloof and irritable

Source: https://en.wiktionary.org/wiki/thornier, https://en.wiktionary.org/wiki/thorny