"entre dos países fronterizos" in English

between- amid- betwixt- amidst- among- among- amongst- amongst- mid- midst- into- with

come in

come in- enter

two- number two- twain- deuce

two

disk operating system- DOS

countries

country- land- covering- nation

frontier- border

at the frontier- near the limit of the country- cross-border

to enter- to go in- to walk in- to break in- to burst in- to come on- to come through- to get in- to get in- to get in- to keyboard- to keypunch- to penetrate- to input- to log in- to come on- to bring in- to take in- to come in- to begin- to start- to log on- to tackle