indispensably
in·dis·pens·a·ble
I0109100 (ĭn′dĭ-spĕn′sə-bəl)These adjectives apply to something that cannot be dispensed with: foods that are indispensable to good nutrition; education that is critical to success; funds essential to completing the project; the necessary tools for the job; lacking the requisite qualifications for the position.