difficult to ...; hard to ...
the person in question; the person themselves; said person
feeling; sensation; preparedness; readiness; thought; sentiment
to satisfy (conditions, one's appetite, etc.); to meet (e.g. demands); to fulfill; to fill (e.g. a cup); to pack; to supply
mind; heart; spirit; the meaning of a phrase (riddle, etc.)
to wear away; to rub down; to abrade
protection; safeguard; guardianship; preservation; conservation
while; during; while; although; all; both
development; evolution; expansion; spreading out; expansion (of an algebraic expression); development (of a three-dimensional shape)
to be seen; to be in sight; to look; to seem; to come
to pass; to elapse; to pass through; to go through; to experience; to go through
change; modification; alteration; revision; amendment
exhaled air; exhalation; expiration
confirmation; verification; validation; review; check; affirmation
air; atmosphere; mood; situation; someone with no presence; someone who doesn't stand out at all
to enter; to go into; to break into; to join; to enroll; to contain; to hold
widow; divorced woman not remarried; unmarried woman
to succeed; to relieve; to take the place of; to substitute for; to be exchanged; to change (places with)
fixing (in place); being fixed (in place); fixing (e.g. salary, capital); keeping the same; fixation (histology); user name (on an online forum like 2ch where the majority of users post anonymously)
appearing that; seeming that; looking like; having the appearance of
new; novel; fresh; recent; latest; up-to-date
method; process; manner; way; means; technique
it is assuredly that ...; can say with confidence that ...
as a matter of fact; by the way; to tell you the truth; to be honest; frankly
somehow or other; for some reason or another; without knowing why
to be sufficient; to be enough; to be worth doing; to be worthy of; to do (the job); to serve
to turn; to revolve; to visit several places; to function well; to pass a certain time
tired; frazzled; tiresome; tiring; draining
pretending not to see something; turning a blind eye to; burying one's head in the sand
to rely on; to depend on; to count on; to turn to (for help)
keep ...-ing; have been ...-ing; leaving (something) on; leaving (something) still in use
in this way; thus; such; uh...
isn't it?; let's ...; why don't we ...; how about we ...
to spend time (on doing something)
courage; bravery; pluck; nerve; grit; guts