founder; originator; pioneer
valley; ravine; glen; gorge
underground; below the ground; world of the dead; the grave; underground (activities, movement, etc.); secret
to live in hiding; to live as a recluse
cavern; cave; cave system; grotto
extent to which (something) is true or false; whether or not (something) is true
goal; target; aim; mark; sign; landmark
cave; tunnel; tunnel tomb (Kofun period)
lightly; gaping wide; suddenly; unexpectedly
hole; opening; pit; hollow; burrow; den; deficit
width; breadth; freedom (e.g. of thought); latitude; gap; difference (e.g. in price)
source of river; fountainhead
total darkness; pitch dark; bleak future; poor prospects
very likely; very probable
to pile up; to stack up; to accumulate
rough; wild; rude; harsh; gruff; violent
to shave (wood, leather, etc.); to sharpen (e.g. pencil); to cut down (budget, expenses, staff, time, etc.); to curtail; to delete; to erase
fine (mesh, fabric texture)
other than; except for; aside from; apart from; save for
perhaps; possibly; maybe; by some chance
direct unforked road; straight path
forever; endlessly; on and on; meandering; wandering; winding
helpless; forlorn; hopeless; unpromising; lonely; discouraging
to mark the end; to spell the end
to reflect; to throw back light
underground lake; subterranean lake
bubble; foam; froth; head on beer
beach; water's edge; coastline; national border; before entering the country
to appease one's thirst; to wet one's whistle
terrible; dreadful; amazing (e.g. of strength); great (e.g. of skills); to a great extent; vast (in numbers)
spring water; clear (pure) water
rich (in flavor, color, smell, etc.); thick; very likely; highly possible; passionate; hot
holiness; sacredness; sanctity; dignity