Potential answers for "Not to be taken lightly"

⭐⭐⭐⭐ GRAVE
⭐⭐⭐⭐ SERIOUS
⭐⭐⭐ MEANSIT
⭐⭐⭐ UNSERIOUS
⭐⭐ ROAD
⭐⭐ INANE
⭐⭐ IDIOMS
⭐⭐ SLUGS
⭐⭐ ONTO

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