How and when to use these three words

ANY WAY, ANYWAY & ANYWAYS

ANY WAY (written as two words) means “in any manner” or “by any means”.

To get them to do the job, they often bribe them anyway they can.

To get them to do the job, they often bribe them any way they can.

ANYWAY (written as a single word) means “nonetheless” or “regardless”.

I didn’t support it; she did it any way (this means that she did it in just any manner she could do it).

I didn’t support it; she did it anyway (this means that she did it notwithstanding that I didn’t support it).

ANYWAYS is an informal or colloquial form of “anyway”, which could be used in casual interactions but better avoided in formal talks or writings.