lightminded (adjective) frivolous: trivial, silly
Sinonime: armed, armored, barricaded, bastioned, bulwarked, buttressed,
covered,
entrenched, fortressed, garrisoned,
guarded, manned,
protected, reinforced, safeguarded, secured, strengthened,
strong,
supported, walled
Antonime: open, unguarded, unprotected