adj. acid, sour, tart, acrid, crabbed

nm. acid, any of a group of sour-tasting substances that dissolve in water and form salts when combined with bases (Chemistry)

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v. hurt, ache; feel sorry for, be sorry for, feel pity for, pity smb., commiserate, have compassion, feel for smb., have mercy, pity, relent, rue, smart, sympathize

N
acid substances (pl.) as solvents

acidum, acidi
n. n. acid substances (pl.) as solvents; 

acidus, acida, acidum
adj. acid/sour/bitter/tart; sour-smelling; soaked in vinegar; shrill; sharp-tongued;