the word 'tearful' is a transparent compound formed within english from its germanic roots. the first element, 'tear', descends directly from the old english 'tēar', which has cognates across germanic languages and can be traced back to the proto-indo-european root dakru-, meaning 'tear'. the second element is the adjectival suffix '-ful', from old english '-full', used to form adjectives meaning 'abounding in' or 'having the qualities of'. the literal combination, 'full of tears', perfectly captures the word's core meaning, describing either a state of crying or something that induces such a state. its formation follows a common and enduring pattern in english for creating descriptive adjectives from concrete nouns.

Structure: tear (tear) + ful (full of) tear: from old english 'tēar', meaning a drop of liquid from the eye. of germanic origin. ful: from old english '-ful', an adjectival suffix meaning 'full of' or 'characterized by'. of germanic origin.