grey matter

(a) material of the brain （脑的）灰质. (b) (fig infml 比喻, 口) intelligence 智力; 脑筋: a boy without much grey matter 脑筋不够用的男孩.

Greenwich Mean Time, greenwood, greet, greeting, greetings, gregarious, gregariously, gregariousness, Gregorian, Gregorian calendar, Gregorian chant, gremlin, grenade, grenadier, Grenoble, grep, grew, grey, grey (also esp US gray), grey area, grey-headed, greybeard, greyhound, greyish, greyish (also esp US grayish), grid, griddle, gridiron, grief, grief-stricken, grievance, grievances, grieve, grieve over, grievous, grievous bodily harm, grievously, griffin, grill, grille (also grill),