The word for deliberately ignoring something is "neglect." Another term that can also apply is "disregard," which implies a conscious decision to pay no attention to something. Both terms suggest a willful choice to overlook or not engage with a person, issue, or responsibility.
The word deliberately is an adverb.
There are 5 syllables in the word deliberately. De-lib-er-ate-ly.
Reckless operation
deliberation
Ignoring it...?
deliberately
Purposely, deliberately.
stuborn people
deliberately, intentionally, purposefully, consciously
I believe the word that you are looking for is ignoring.
IgnorationHope I helped!
forfeit, concede