Vous avez cherché: to fail (Anglais - Latin)

don't be afraid to fail
noli timeri

to fail to plan is to plan to fail
fail to plan plan to fail

to fail, to weaken, to be in want
deficio (defectum)

by failing to prepare you are preparing to fail
in rationem non ad prepareere vicinare

to give up is to fail, and failure is not an option
et maior

to fail, be wanting / fail in duty, commit a crime
delinquo

and it is easier for heaven and earth to pass, than one tittle of the law to fail.
facilius est autem caelum et terram praeterire quam de lege unum apicem cader

hear this, o ye that swallow up the needy, even to make the poor of the land to fail,
audite hoc qui conteritis pauperem et deficere facitis egenos terra

if i have withheld the poor from their desire, or have caused the eyes of the widow to fail;
si negavi quod volebant pauperibus et oculos viduae expectare fec

for the vile person will speak villany, and his heart will work iniquity, to practise hypocrisy, and to utter error against the lord, to make empty the soul of the hungry, and he will cause the drink of the thirsty to fail.
stultus enim fatua loquetur et cor eius faciet iniquitatem ut perficiat simulationem et loquatur ad dominum fraudulenter et vacuefaciat animam esurientis et potum sitienti aufera

and joy and gladness is taken from the plentiful field, and from the land of moab; and i have caused wine to fail from the winepresses: none shall tread with shouting; their shouting shall be no shouting.
ablata est laetitia et exultatio de carmelo et de terra moab et vinum de torcularibus sustuli nequaquam calcator uvae solitum celeuma cantabi