to (make something) quiver; to shake; to tremble; to vibrate
to backfire; to produce a result opposite to what was expected or intended
best one could ask for; just what one wants; welcome (news); heaven-sent
beyond one's means or position
to weaken; to grow weak; to be downcast; to be dejected; to be troubled; to be at a loss
friendly fire; killing each other by mistake; internecine strife
one's field of expertise; one's strong area
openly; squarely; directly; to a person's face
self-taught method; one's own way; one's own style
divergence; ramification; bifurcation; branching off
change; alternation; rotation; replacement; substitution; shift
muscular pain; myalgia; aching muscles; sore muscles
personal history; background; career
lack of physical exercise; insufficient exercise; inactivity
danger to oneself; (fear of) one's physical safety
to seclude oneself; to shut oneself away
(among) one's friends; (within) one's circle
(afternoon) nap; sleeping during the day; siesta
on a routine basis; regularly; habitually
mountain climbing; mountaineering
strained back; slipped disk; lumbosacral strain
(very) familiar; well-acquainted
long distance; long haul; long-distance race
putting one's life on the line; staking one's life (on); risking one's life; life and death situation
one's turn; one's shift; one's turn on stage; screen time; one's time (to act); one's chance
to calculate; to compute; to deduce; to infer; to conclude
skill; proficiency; experience; dexterity
cessation; (coming to an) end
commonplace; ordinary; typical; ubiquitous; run-of-the-mill; mundane
convenience; accommodation; advantage; benefit; expediency
toilet; restroom; bathroom; going to the toilet; relieving oneself
to rest; to suspend; to give relief
to maintain one's honor as a man; to save face (as a man); to have one's honor upheld
shout of joy; cry of pleasure; jubilant comments
cruel; brutal; ruthless; merciless; inhuman
one night; one evening; all night; overnight
to fit; to get into; to be fit for (a job, etc.); to be suited for; to fall into; to plunge into
secretly; in secret; unseen; unobserved; inwardly; in private
right (to do something); authority; power
assistant; helper; assistant (to a professor); research assistant
process; procedure; sequence; protocol; instruction