'attitudinizer' originates from English formation using the noun 'attitude' (from French/Italian) combined with the suffix '-ize' and agentive '-er'.

'attitude' came into English from French 'attitude' (from Italian 'attitudine'), ultimately tracing back to Latin roots (compare 'aptitudo'); the verb 'attitudinize' was formed in English by adding the verb-forming suffix '-ize' to the stem 'attitudin-' and 'attitudinizer' was later formed as the agent noun.

Initially connected to the noun 'attitude' meaning 'posture' or 'position', the formation with '-ize' developed the sense 'to assume an attitude', and 'attitudinizer' came to mean 'one who assumes posed or affected attitudes'.