earnest

a.认真的

ear-drum, ear-muff n, ear-plug, ear-ring, ear-splitting, ear-trumpet, earache, earful, earl, earldom, earliness, early, early and late, early closing, early or late, early warning, earmark, earn, earn one's living, earner, earnestly, earnestness, earning, earnings, earnings-related, earphone, earplug, earring, earrings, earshot, earsplitting, earth, earth science, earthen, earthenware, earthiness, earthlight, earthly, earthquake, earthwork,