127 entries under tough topic. ×

1
unbending(adjective, close, strong, hard, cool)
1
uncontrite(adjective, hard, harsh, cruel)
1
unmerciful(adjective, hard, harsh, cruel)
1
unpermissive(adjective, severe, firm, harsh)
1
unregenerate(adjective, hard, harsh, cruel)
1
unremitting(adjective, hard, harsh, cruel)
1
unrepenting(adjective, hard, harsh, cruel)
1
unsparing(adjective, close, strong, hard)
1
uptight(adjective, severe, firm, harsh)
1
vindictive(adjective, hard, harsh, cruel)
0
adamantine(adjective, strong, hard, sturdy)
0
dense(adjective, strong, hard, sturdy)
0
ferric(adjective, strong, hard, sturdy)
0
ferrous(adjective, strong, hard, sturdy)
0
immovable(adjective, strong, hard, sturdy)
0
indomitable(adjective, strong, hard, terrible)
0
insensible(adjective, strong, hard, sturdy)
0
ironfisted(rigid, scrupulous)
0
robust(adjective, strong, hard, sturdy)
0
scrupulous(adjective, severe, firm, harsh)
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APASmart Define. (2016). forbidding thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/forbidding/thesaurus/synonyms
ChicagoSmart Define. 2016. "forbidding thesaurus" https://smartdefine.org/forbidding/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2016, forbidding thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/forbidding/thesaurus/synonyms>.
MLASmart Define. "forbidding thesaurus" 24 March 2016. Web. 30 September 2026. <https://smartdefine.org/forbidding/thesaurus/synonyms>