Merriam-Webster's Dictionary and Thesaurus - Merriam-Webster [1466]
un·der·sell verb -sold ; -sell·ing : to sell articles cheaper than
un·der·sexed adjective : deficient in sexual desire
un·der·shirt noun : a collarless undergarment with or without sleeves
un·der·shoot verb -shot ; -shoot·ing 1 : to shoot short of or below (a target)
2 : to fall short of (a runway) in landing an airplane
un·der·shorts noun plural : underpants for men or boys
un·der·shot adjective 1 : moved by water passing beneath 2 : having the lower front teeth projecting beyond the upper when the mouth is closed un·der·side noun : the side or surface lying underneath Synonyms bottom, underbelly—more at BOTTOM un·der·signed noun, plural undersigned : one whose name is signed at the end of a document un·der·sized also un·der·size adjective : of a size less than is common, proper, or normal Synonyms dwarf, dwarfish, fine, little, pocket, pygmy, slight, small—more at SMALL un·der·skirt noun : a skirt worn under an outer skirt; especially : PETTICOAT un·der·staffed adjective : inadequately staffed un·der·stand verb -stood ; -stand·ing 1 : to grasp the meaning of : COMPREHEND 2 : to have thorough or technical acquaintance with or expertness in <~ finance> 3 : to have reason to believe 4 : INTERPRET 5 : to have a sympathetic attitude 6 : to accept as settled 7 : to believe or infer something to be the case — un·der·stand·able adjective Synonyms [1] appreciate, apprehend, catch, catch on, comprehend, get, grasp, make, make out, perceive, see, seize, tumble—more at COMPREHEND [2] comprehend, grasp, know—more at KNOW [7] conclude, deduce, extrapolate, gather, infer, judge, reason—more at INFER un·der·stand·ably adverb : as can be easily understood