had been called upon to fathom.había sido llamado a comprender.
... only a mother can fathom it:... solamente una madre puede comprender
... have been unable to fathom.... , ha sido incapaz de comprender.
... in the vain attempt to fathom their truly immeasurable capacity for... en el vano intento de comprender su capacidad verdaderamente incalculable para
... a spare sail, a fathom or two of... una vela de repuesto, comprender una o dos de