accommodating,
accommodative helpful in bringing about a harmonious adaptation; "the warden was always accommodating in allowing visitors in"; "made a special effort to be accommodating"
cooperative done with or working with others for a common purpose or benefit; "a cooperative effort"
encouraging giving courage or confidence or hope; "encouraging advances in medical research"
utile,
useful being of use or service; "the girl felt motherly and useful"; "a useful job"; "a useful member of society"
accommodating helpful in bringing about a harmonious adaptation; "the warden was always accommodating in allowing visitors in"; "made a special effort to be accommodating"
adjuvant enhancing the action of a medical treatment; "the adjuvant action of certain bacteria"