keen

ablest active acute acute admirable anxious appreciative ardent astute athirst avid brighter brighter bright bright brightest brightest brisk caustic chipper chomping at the bit clever cleverest coldest cold conscious cool coolest covetous crafty crazier craziest crazy cried cries cry cunning dandy dashing deep desirous dirge discriminating dry eager earnest enthusiastic enterprising exquisite fine fresher freshest fresh gay glowing gnawing gnarly grieve groaning groaned groan hot hotter hottest howled howl hungry impatient incisive insightful intense intelligent interested ironic/ironical ironic judicious knifelike laments lament/lamentation lamentations lancinating livelier lively maddest mad marvelous moaned moan more interested more acute more acute more eager more ironic more ironic most sagacious more intelligent most appreciative most sapient more conscious most astute most ironic most ironic most interested most ironical more active more astute more ironical mourn mourned mucronate nifty nutty nutser nuttiest nuttiest nutsest nuts/nutty nuttier nuttier observing observant peaches-and-cream penetrating peppery perceptive peppy perspicacious pert piercing poignant pointed pointed pointy probing profound pungent racy quick-witted quicker quicker rabid quick quick quickest quickest raring ready ready ripping ruminative sagacious sapient savvier savviest savvy sensational sensitive sharp sharp sharp sharp-witted shivery shrewd shrewdest smartest smart smarter solicitous sour spicy spirited sprightly stabbing subtle super susceptive swell terrific thirsting thirsty thoughtful trenchant tricky ululate ululation unforbearing vigilant vivacious wail wailed warmest warm watchful weep wept wisest wise wiser wishful witty would-be zealous youthful