sequence

\ \ [14] Sequence is at the centre of a large family of English words that go back ultimately to Latin sequī ‘follow’ (others include consecutive [17], consequence [14], ensue, obsequious [15], persecute [15], prosecute, pursue, second, sect, subsequent [15], sue, and suit). Sequence itself comes from late Latin sequentia, a derivative of the present participle sequēns. Another Latin derivative was sequēla ‘that which follows’, which has given English sequal [15]. Sequī came from the Indo-European base *seq-, which also produced Greek hépomai, Irish sechur, Lithuanian sekti, and Sanskrit sac-, all meaning ‘follow’.

\ \ Cf.⇒ CONSECUTIVE, CONSEQUENCE, ENSUE, OBSEQUIOUS, PERSECUTE, PROSECUTE, PURSUE, SECOND, SECT, SEQUAL, SET, SUE, SUIT