fort-, forc-

(Latin: brave; power, strength, strong)

reinforcement, reenforcement, re-enforcement
reinforcer, reenforcer, re-enforcer
Viris fortibus non opus est moenibus.
To brave men, walls are unnecessary.

Agesilaus the Great, King of Sparta (c. 375 B.C.), was quoted as saying, "These are the Spartan walls" as he pointed to the citizens in full armor when someone wanted to know why Sparta was without walls.

Virtus ariete fortior.
Virtue is stronger than a battering ram.

Virtus, "virtue", here may also be interpreted as "valor" or "heroism".

Virtus Unita Fortior.
Strength united is stronger.

The motto on the national and civil flag of the principality of Andorra, an independent republic in the Pyrenees mountains, located between France and Spain. It is one of the world's oldest states.

Vis unita fortior.
Strength united is stronger.

Motto on the 1776 seal of the State of New Hampshire, USA.