only with great difficulty or effort [= only just]:
She was very old and barely able to walk.
Mary had barely enough money to live on.
barely audible/perceptible/visible/discernible etc
His voice was barely audible.
She could barely understand English.
almost not [= hardly]:
She was barely aware of his presence.
Joe and his brother are barely on speaking terms.
used to emphasize that something happens immediately after a previous action [= only just British English]
Graham had barely finished his coffee when Henry returned.
used before amounts or numbers to emphasize that they are surprisingly small [= only]:
Nowadays the village has barely 100 inhabitants.