when the going gets tough

:  an act or instance of going

:  behavior, actions

:  the condition of the ground (as for walking)

:  working, moving

:  living, existing

:  current, prevailing

:  to gain possession of

:  to receive as a return :  earn

:  to obtain by concession or entreaty

:  something begotten:

:  offspring

:  the entire progeny of a male animal

:  a document of release from obligation in Jewish law

:  a bill of divorce

:  a religious divorce by Jewish law

:  difficult to accomplish, resolve, endure, or deal with

:  capable of enduring strain, hardship, or severe labor

:  unruly, rowdyish

:  in a tough manner (see ¹tough)

:  a tough and violent person :  rowdy

:  to bear unflinchingly :  endure