a hard nut to crack

a hard nut to crack informal a person or thing that is difficult to understand or influence 〈非正式〉棘手之事, 难对付的人。

• fit out
• interlacings
• negative potential
• tortoise
• retrograded
• Tokyo
• lipodystrophies
• impetuosities
• acushla
• ombudsmen
• dissocial
• thrang
• quotidian
• hajjis
• a matter of
• fthm.
• aggiornamentoes
• Peking man
• lodge power in someone
• hand-running
• self-belt
• bufalin
• technicalizes
• inoculates
• jimson weed
• shortfused
• bloodline
• waiting lines
• han't
• cleanlinesses
• nooned
• omnidirectional microphone
• catalytic activity
• flavors
• leucodystrophies
• information ages
• claustrophilia
• Anglo-Gallic
• bouillon cubes
• Phased array.
• Bartram, William
• Tapuyan
• trialists
• be sold out (of sth)
• carinae
• raffia palm
• sodalist
• adenylic acids
• ignimbrite
• inextricable
• war rooms
• war of position
• crimper
• aphasiologists
• guidelines
• put sb to death
• Narbada
• debarker
• squalidness
• leaf blights
• gamma acid
• pig's ears
• cowshed
• myautonomy
• inflowing
• tenant at will
• be away
• theologised
• fan truss
• zero-sum
• modificator
• cirrhosed
• stillfish
• put（或set）the cat among the pigeons
• self-effacingly
• correctible
• french guineas
• professionalize
• sleeping rent
• begging bowls
• be enamoured of
• reoviruses
• be on your uppers
• surmullets
• rock rabbit
• lanolins
• deorbit
• back bearing
• prosage
• air-kiss
• water type
• jacksnipe
• at a/one bound
• Grecomania
• wrapper
• in good voice
• associated with
• centromeric DNA
• tummelberries
• countershocks