undulation; ups and downs; highs and lows
mouthful; morsel; gulp; sip; one word; in short
getting information (esp. by interviewing witnesses, etc. in a police investigation)
water; liquid; fluid; moisture; humidity; sap
gymnastics; physical exercises; artistic gymnastics; gymnastics competition; physical education (class); PE
diving; submerging; going underwater
visual confirmation; sighting
taking a breath (while singing, swimming, etc.); short break; breather
surfacing; rising to the surface; emerging; leaping into prominence; rising (of rank)
silly; foolish; absurd; childish; easy; trifling
emergency; accident; rare possibility; unexpected occurrence
holiday house; vacation home; villa; prison; jail
area of holiday homes; area of villas
illness; disease; bad habit; weakness; fault
one night; one evening; all night; overnight
later; afterwards; future; after one's death; (arch.) descendant
to struggle in the water; to sink below the surface and become unable to breathe; to (nearly) drown; to indulge in; to lose one's head over something; to be addicted
(stand to) attention!; standing at attention
idea; plan; draft; rough copy; expectation; (arch.) desk
as a matter of fact; to tell the truth
early morning; early hours; early in the morning
fishing; angling; change (for a purchase); clickbaiting; trolling; writing deliberately inflammatory posts online
use; adoption; acceptance; appointment; employment; engagement
wages; pay; rental payment
each (person); everyone; individual; respective
breaking up (e.g. meeting); dispersing (e.g. crowd); dissolving (company, organization, etc.); liquidating; dissolving (diet, parliament, etc.)
what with this and that; for a number of reasons
very; greatly; immense; enormous; serious; grave
the way back; the way home; return trip
to (happen to) see; to notice; to catch sight of
caller; visitor; company; guest
to see someone off (at a station, an airport, etc.); to escort (e.g. home); to follow something with one's eyes until it is out of sight; to let pass; to pass up (an opportunity etc.); to shelve (a plan, deliberation on a bill, etc.); to postpone
that way; that direction; that (one); that person; there; over there
as one would expect; just as you'd expect (from); still; all the same; even ... (e.g. "even a genius")