'US-compliant' is a modern English compound formed from the abbreviation 'U.S.' (United States) and the adjective 'compliant' (from 'comply').

'compliant' comes from the verb 'comply', which entered English via Old French (e.g. 'complir') from Latin 'complēre' (to fill up, accomplish); 'comply' later took on the sense of 'yielding to requirements', and modern adjectives like 'compliant' were formed and combined with abbreviations such as 'U.S.' to make 'US-compliant'.

Initially related to 'filling' or 'completing' in Latin roots, the lineage led to senses of 'acting in accordance', and today 'US-compliant' specifically means 'in accordance with United States standards or rules'.