Where does “armchair psychologist” come from?

armchair psychologist (English) comes from English armchair, from English chair, from English Chuck, from English chock, from French choquer, from German schockieren, from Spanish chocar, from Portuguese chocar — er.

armchair psychologist (English): One who gives psychological advice or speculates about a person's mental health without any qualification to do so

Definitions

  1. One who gives psychological advice or speculates about a person's mental health without any qualification to do so

Ancestry of “armchair psychologist”, step by step

armchair psychologist traces back through two separate lines of ancestry.

via English armchair

StepLanguageWordMeaning
1EnglisharmchairA chair with supports for the arms or elbows;...
2EnglishchairAn item of furniture used to sit on or in,...
3EnglishChucka Chuck Taylor All-Stars shoe
4EnglishchockAny object used as a wedge or filler, especially...
5Frenchchoquerto hit, to collide; to shock
6Germanschockierento shock
7Spanishchocarto crash; to bump into, to collide with; to...
8Portuguesechocarto brood; to hatch; to linger
9Russianшоки́роватьto horrify, to scandalize, to shock
10Russian-и́роватьa productive verbal suffix, also used to create new verbs, especially from loanwords
11German-ierenVerb suffix: it and its inflected forms are found...
12French-erForms infinitives of first-conjugation verbs
13Middle French-erForms infinitives of first-conjugation verbs;...
14Old French-iersuffix used to form infinitives of first...
15Latin-āriuser

via English psychologist

StepLanguageWordMeaning
1EnglishpsychologistAn expert in the field of psychology
2EnglishpsychologyThe study of the human mind; The study of human...
3Frenchpsychologiepsychology
4Latinpsychologia
5Latin-logia-logy; the study of
6Ancient Greek-λογίαBase for nouns denoting the study of something,...
7Ancient GreekλόγοςThat which is said: word, sentence, speech,...
8Ancient GreekλέγωI put in order, arrange, gather; I choose, count,...
9Proto-Indo-Europeanleǵ-to gather, collect, with derivatives meaning to...
Every word from Latin -āriusEvery word from French -erEvery word from German -ieren