rack （或wrack） one's brains （或brain）

rack （或wrack） one's brains （或brain） make a great effort to think of or remember something 冥思苦想, 绞尽脑汁。

• pardonless
• indiscriminative
• brahmanisms
• exert yourself
• wire-rim
• mock ... up
• screw up courage
• abscondings
• clashingly
• trochili
• trilobitic
• gurglet
• hackishly
• court of appeals
• pedigreed
• avellan
• of happy memory
• coatdress
• leave someone to to his own resources
• Timor Sea
• sea-roving
• amphidromic point
• in ... depth
• wellhouses
• fluidal
• viscosity conversion table
• saltigrades
• code numbers
• outroads
• Sardis
• etfs
• coruscant
• comedies
• speak in tongues
• general outlook on
• defensed
• bless one's lucky stars
• think nothing of doing sth
• degreases
• strike a fish
• as many as…
• wayfaring trees
• buzzing
• multicycles
• silk grasses
• familygram
• emasculating
• proportional to
• hauds
• rhyolites
• two-sided ideal
• discretionarily
• have one's heart set on
• cating
• perfuming
• Ondes Martenot
• in retrograde
• sporotrichosis
• Brillouin function
• not do sb / sth any favours
• out of measure
• margays
• cast round (for)
• be guilty of
• helix
• -graphy
• horsebean
• cotransduction
• chimney stacks
• lacey
• Cambrians
• if I were you
• to harbour designs against
• compassion
• Xenophanes
• sheriff
• whitebait
• Hum.
• marinated
• voltage-regulator diode
• direct lighting
• standardising
• cultivators
• peculiar galaxy
• epencephala
• the devil's bones
• tamability
• mesosomes
• dystrophic
• thermal bulb
• t.b.a
• cyprinoid
• Vaughn
• Amphitryon
• splashiness
• junk sculptor
• cargo boat
• sandbox
• dwell in
• if the worst comes to the worst