originator; pioneer; inventor; progenitor; primogenitor; founder of a family line
source (e.g. of a river); headwaters; origin of something continuous (language, culture, etc.)
beneficial; profitable; useful; helpful; instructive
indispensable; essential; requisite; required; compulsory; necessary
power; motive power; dynamic force; three-phase electricity
find it against one's conscience (to do); too proud (to do)
inexperienced; immature; green; grassy-smelling; smelling of raw vegetation
to hide; to keep to oneself
to stake; to risk; to bet; to wager
fixed number; certain number; given number; definite number
ordinary; average; common; normal; like the average person; like most people
to have an ulterior motive; to have an axe to grind
ready with a rifle leveled
to take pains; to take time for someone; to do work for someone; to go to trouble for someone
to emit; to spout; to spurt; to boil over
way out; means to escape; escape route
bearing; heading; point of the compass
indiscriminate shooting; random shooting; firing blindly
route; course; path; one's future course (e.g. after graduating high school)
gunfighter (esp. in the American Old West); gunslinger; gunman
hand game (e.g. rock-paper-scissors)
assistance; support; subsidy; supplement; auxiliary; subsidiary
the most one can do; the best one can do; the best one can expect
demonstrative of one's worth; worthy of one's reputation; living up to one's name; bolstering one's reputation; enhancing one's prestige; winning one honour
dramatic (improvement); remarkable (difference); marked; (far) better; exceptional
plan to overcome an obstacle or break out of a deadlock; breakthrough solution
to have a tendency to; to be liable to; to have a touch of; to have a smack of
to lose a closely fought contest
to brave; to risk; to harm; to afflict; to desecrate; to profane
based on; built on; made from
to read (somebody's) thoughts; to guess what (someone) is thinking
smelling of mud or earth; unrefined; uncouth
to separate (by distance, time, etc.); to isolate; to interpose; to have between; to alienate; to estrange
breakdown; failure; damage; hurt; objection; protest
passing through (a tunnel, station, town, etc.); passing by (e.g. of a typhoon); passage (of a bill, e.g. through parliament); carriage; passing (an examination, inspection, etc.); clearing