The term 'hardly mild' is an oxymoron, meaning that it combines two words with opposite meanings. The crossword solutions for this term are INTENSE (7 letters), SEVERE (6 letters), and FIERY (5 letters). These words all describe something that is not mild, but rather INTENSE, SEVERE, or FIERY. INTENSE can mean having a high degree of strength, concentration, or force, while SEVERE means very serious or harsh. FIERY can refer to something that is passionate, energetic, or hot-tempered. All three words describe something that is far from mild.