prefab プレハブ (especially of a building) manufactured in sections to enable assembly on site; prefabricated.
rows of prefab bungalows

aurora borealis 極光 

runt 一緒に生まれた子どものうち一番小さい動物 an animal that is smaller than average, especially the smallest in a litter.

fishy 胡散臭い arousing feelings of doubt or suspicion. - - I'm convinced there is something fishy going on.

foal 子馬

slog 苦労して働く work hard over a period of time. - - They were slogging away to meet a deadline.

logjam 川をせき止めている大量の木 - - a crowded mass of logs blocking a river.

troll 巨人や小人 (in folklore) an ugly creature depicted as either a giant or a dwarf. - - Nobody was allowed to cross the bridge without the troll's permission.

kitchenette 簡易キッチン a small kitchen or part of a room equipped as a kitchen.

kernel 実の中心の食べられる部分、芯 a softer, usually edible part of a nut, seed, or fruit stone contained within its hard shell.

innate 先天的な inborn; natural. - - Her innate capacity for organization

nectar 蜜 a sugary fluid secreted by plants, especially within flowers to encourage pollination by insects and other animals. It is collected by bees to make into honey.