most important
predominant
full of vigor
robust
a strong defense
bulwark
stronghold, fortress
bastion
lacking strength or power
impotent
lord
domit
incapable of being penetrated or affected
impervious
not
in-, im-
to effect
efficere
unable to entered by force
impregnable
muscular strength
brawn
unable to be conquered
indomitable
arousing fear; formidable; awesome
redoubtable
physically or morally strong person; strong supporter
stalwart
capable of producing a desired effect
efficacious
awesome; hard to overcome; dreadful
formidable
strong and effective
potent
strong
potens