securely

The adverb has 4 meanings:

Meaning #1: in a secure manner; in a manner free from danger
  Synonym: firmly
  Derived from adjective: secure (meaning #5)

Meaning #2: in a confident and unselfconscious manner
  Antonym: insecurely (meaning #1)
  Derived from adjective: secure (meaning #1)

Meaning #3: in a manner free from fear or risk
  Antonym: insecurely (meaning #2)
  Derived from adjective: secure (meaning #2)

Meaning #4: in an invulnerable manner
  Derived from adjective: secure (meaning #6)