English dreadful

← English dread (suffix)

← English ful (suffix)

← Middle English dredful (inherited)

← Middle English dredfull (mention)

← Middle English dredeful (mention)

← Middle English dreful (mention)

→ English dreadfully (suffix)

→ English dreadfulness (suffix)

→ English penny dreadful (mention)

→ English undreadful (prefix)

→ Japanese 畏まる (mention)

→ Vietnamese khủng (link)