1. In such a manner as could not be otherwise
   - necessarily, of necessity, needs 
2. By necessity
   - inescapably, ineluctably, unavoidably

See also: inevitable

Encyclopedia: Inevitably

• public holiday
• public house
• public housing
• public knowledge
• public lavatory
• public law
• public lecture
• public library
• public mover
• public nudity
• public nuisance
• public office
• public opinion
• public opinion poll
• public presentation
• public press
• public property
• public prosecutor
• public relations
• public relations man
• public relations person
• public school
• public sector
• public security
• public servant