A sleeping giant
Baseless; Groundless
A well-rested child is a healthy child
To cry uncle
To nip it in the bud
Honed through years of practice
Time to pay the piper
communicating without words
Seniority system
the worst day ever
sharp perception and insight
Where there's a will, there's a way
Better safe than sorry
Nature is constant, people change
A tower built with care does not fall easily
To take extra care
A clever hawk hides its claws
You can't run with the hare and hunt with the hounds
in the past; long ago
cerebrospinal fluid
Chinese trumpet vine