The term VERB WITH THOU is a reference to the archaic English verb conjugation known as the 'thou form'. This form of conjugation was used in the English language until the 17th century and is still used in some dialects today. The crossword solutions for this term are DOST (4 letters), HAST (4 letters), DOEST (5 letters), ART (3 letters), and HADST (5 letters). These words are all conjugations of the verb 'to do' in the thou form, with DOST being the present tense, HAST being the past tense, DOEST being the present subjunctive, ART being the imperative, and HADST being the past perfect.