difficult to understand; difficult to grasp; confusing; puzzling
stronghold (esp. of an enemy or opponent); inner citadel; bastion
easy; easygoing; carefree; happy-go-lucky; optimistic; leisurely
to receive; to take; to get someone to do something; to have in one's pocket (a fight, match); to contract (a disease); to catch
devastating; gut-wrenching; shocking; startling; sensational; astounding
to bring (news, knowledge, etc.); to introduce; to bring about; to cause; to produce (e.g. results)
double take (esp. out of surprise)
achievement; attainment; accomplishment; realization
big welcome; welcoming greatly; being very welcome
to lose focus; to let one's mind wander; to relax one's attention
to catch up (with); to draw level; to pull even; to be compensated; to make up for one's losses
(slowly and) carefully; without haste; thoroughly; deliberately; closely; meticulously
firm promise; definite promise
collaborator; cooperator; coworker; ally
to bear fruit; to ripen; to produce (good) results; to show results; to bear fruit
knothole; peep-hole; (fig.) bad eyes; tunnel vision
thin (of an object); pale; light; watery; thin; weak (taste, etc.); little (affection, etc.)
to call (someone) back; to recall; to call home; to bring back (memories, etc.); to recall; to revive
to go (to); to make one's way (to); to visit
normal operation (of a train service, bus service, etc.); running normally; normal state of affairs; business as usual
otherwise; if not; or else
middle; midway; middle position; moderate position; interim; intermediary
expected value; expectation; expectations; expectation value (in quantum mechanics)
to leave words (behind one, e.g. after death); to say (for posterity); to utter last words; to leave some things unsaid
office work; clerical work; administration; business; affairs
tedious; boring; dull; to feel bored; to get bored (with); to get tired (of)
investigation; inspection; examination; tune; note; melody
market price; speculation (e.g. on stocks); reputation (according to conventional wisdom); estimation
fireworks display; display of fireworks
strength; power; proficiency; ability
to colour; to color; to apply make-up; to decorate; to garnish
volume (of book); reel (of film); scroll (of books or paintings); roll (paper, etc.)