merciless; ruthless; pitiless; unfeeling
reason; cause; circumstances
quick; speedy; prompt; rapid; swift
labor; labour; toil; hardship
unvoiced opinion; (opinion of the) silent majority; views which are not expressed
reluctant; unwilling; involuntary; unintentional; unintended; unlooked-for
using freely; making full use of; having a good command of; working (someone) hard; driving (someone) on
via; through; by doing; by means of; using
vigilance; caution; alertness; precaution; being on guard
infiltration; sneaking in; going undercover
getting closer; drawing nearer; being not much different; being near (age, skill, etc.); becoming close (i.e. friendly); becoming intimate
skillful; adroit; craft; craftsmanship; plot; scheme
establishment; institution; installation (of a machine or equipment)
ability; competency; talent; skill; capacity
to disturb; to prevent; to obstruct; to hinder
discovery; detection; finding
preemptive strike; preemptive attack; first strike
unusual event; strange occurrence; strange phenomenon; something abnormal; change (for the worse); accident
estimate; estimation; valuation; quotation
upward adjustment; upward revision
to move (house); to transfer (department); to change the target of interest or concern; to elapse (passage of time); to be permeated by a colour or scent; to be infected
inside a car (train, bus, etc.)
defense; defence; protection
hectic; bewildering; bustling; dizzy
to change completely; to switch (to); to shift (to another mode)
apron of a gun; cover for the touch-hole on a cannon or matchlock
to (take out and) show; to demonstrate; to point out (finger, clock hand, needle, etc.); to indicate; to show
deep; profound; dense; thick; close (relationship); intense; strong
figure of a person; figures of people; shadow of a person
men and women; man and woman; both sexes; both genders
contract; compact; agreement
head; leader; top; (arch.) important part
battle formation; camp; encampment; group; gang; war
inconsistency; discord; conflict; discrepancy; contradiction; failure
to produce; to yield; to cause; to result from; to arise; to be generated
disorder; chaos; confusion; mayhem
essential part; indispensable part; unavoidable part; front and back matter (of a book, magazine, etc.)
plan; scheme; (payment) plan; package; deal