"faltar a una obligación" in English

to lack- to be lacking- to be missing- to be left- to miss sth

refute

A

at- to- toward- on- within- into

oneone

a

one- one- you

a- an

to join- to bring together- to amalgamate- to connect- to join up- to link- to link- to marry- to meld- to merge- to rally- to run on- to splice- to splice together- to unify- to bind- to unite- to combine- to mix- to consociate

obligation- liability- encumbrance- commitment- duty- bond- debt security- debenture- debenture bond

nail- fingernail- fluke- sting- toenail- claw- hoof- toe- pick- plectrum