may; might; perhaps; may be; possibly
elucidation; explication; explaining; unravelling; clarification; understanding
injuries and sickness; wounds and illness
stamina; endurance; physical strength; strength of an organization (e.g. profitability, productivity, economic clout, stability, growth potential)
substitute; replacement; stand-in; proxy; compensation; exchange
experiments using animals; in-vivo testing; animal testing
strict; close; precise; scrupulous
large tree; big tree; huge tree
aging; ageing; adding to one's years
ageing; aging; senile deterioration
main cause; primary factor
to throw oneself down; to lie down
after a long time; for the first time in a while
to leave home; to leave one's parental roof; to leave the nest; to go out on one's own
place; spot; address; district; area; one's house; point
to turn up; to make an appearance; to put in an appearance; to drop by
to feel awkward; to feel ashamed; to feel inferior; to feel shy (about doing something)
being independent; standing on one's own; becoming independent
the teens (10-19); teenage; the tenth generation
independence; self-reliance; independence (e.g. of a nation); freedom; separation; isolation
until then; till then; to that extent; the end of it; all there is to it
ideally; if one were to wish for more
revival; reconstruction; restoration; rebuilding; recovery; renaissance
implementation (e.g. of a system); materialization; materialisation; realization; realisation; actualization
to leave as; to view as; to maintain the status quo
to distinguish between; to tell the difference between
... all over again (repeating the same failure)
lonely; lonesome; solitary; desolate
to be unsteady; to reel; to shake; to waver; to be unsettled (feelings, thoughts, etc.)
bulky and heavy; massive; solid; dignified; imposing; composed
to ascend; to go up; to ascend (as a natural process, e.g. the Sun); to rise; to go to (the capital); to be promoted; to add up to
to step on; to tread on; to set foot on (e.g. foreign soil); to stand on; to experience; to undergo; to follow (rules, principles, etc.)
at one's feet; underfoot; gait; pace; most recent; current
to do for (the sake of someone else)
to entrust; to leave to a person
(it was) not until; (it was) only when
filial piety; showing devotion (to someone)
without; unacceptable; not alright; unsatisfactory