'seamlike' originates from modern English, formed by combining the noun 'seam' and the adjectival suffix '-like' (meaning 'having the nature of' or 'resembling').

'seam' comes from Old English 'seam' (meaning 'seam, suture, join'), and the adjective-forming element '-like' developed from Old English suffix '-lic' (Middle English '-lich'), so forms such as 'seamlich' in Middle English evolved into the modern compound 'seamlike'.

Initially the components meant 'a line/join' ('seam') and 'having the nature of' ('-like'); the combined word has retained the sense 'having the nature or appearance of a seam' into modern usage.