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advertir(ie)
to warn
cometer
to make (a mistake)
emprender
to undertake
el error
mistake, error
insistir
to insist
luchar
to struggle
persistir
to persist
progresar
to progress
prosperar
to prosper
seguir adelante
to continue on, to carry on
solucionar
to solve
superar
to overcome
la advertencia
warning
el fracaso
failure
la mejora
improvement
el obstáculo
obstacle
el sufrimiento
suffering
criticar
to criticize
es imprescindible que...
it is indispensable/imperative that
es raro que
it is strange that
evaluar
to evaluate
por un lado
on one hand
por el otro lado
on the other hand