Definition of well-fortified in US English:

well-fortified

adjective

  • Heavily or fully fortified; especially provided with good fortifications; made strong or secure.

Origin

Mid 16th century; earliest use found in Thomas Elyot (c1490–1546), humanist and diplomat. From well + fortified.

Pronunciation

well-fortified

/ˌwɛlˈfɔːtɪfʌɪd/