obligately

/ˈɑblɪɡətli/
adverb
  1. In a way that is required or necessary; by necessity.
    • The bacteria are obligately dependent on a host to survive.
    • The contract obligately requires both parties to complete the work by the deadline.
    • In this ecosystem, certain plants are obligately pollinated by a single insect species.
Antonyms
What does "obligately" mean? | whatsthatwordmean | whatsthatwordmean