to work hard on something for a long period
trabajar duro en algo durante un largo período (trabajar duro en algo durante un largo periodo)
"She grinded away at her studies to pass the exam."
"Ella trabajó duro en sus estudios para aprobar el examen." (ella trabajo duro en sus estudios para aprobar el examen)
Mental calmness leads to happiness and contentment.
to start being broadcast on television or radio
a very clever or intelligent person
The truth can be painful to hear.
generally speaking; on the whole
acting impulsively or emotionally, without thinking