arduously
source sentence: I have a place on the East Coast, where our neighbor is so much a part of our family that my mother never passes her house at night without glancing at the lights to see if she is home and safe; where my parents have hauled hundreds of pounds of rocks from fields and arduously planted Christmas trees and blueberries, lilicas, asparagus, and crab apples; where my father still dreams of angling a stream to a new bed so that he can dig a pond in the field and fill it with water and fish.
context clues: inference clues, indirect example clues, (syn.) diligently, (ant.) lazily, lathargically, (ex.) A hard working person is an example of an arduous person.
definition: requiring great exertion; laborious; difficult
original sentence: The hunters arduously trudged through the jungle to find food for their tribe.
http://dictionary.reference.com/browse/arduously
