The cardinal number one, appearing in various dialectal forms (masculine εἷς, feminine μία or ἴα, neuter ἕν) across Greek literature. As a numeral, it simply counts: one object, one person, one event. But it frequently carries emphatic force: 'one alone,' 'a single one,' suggesting uniqueness or exclusivity. It can be strengthened by additional words for emphasis ('one only,' 'one single'). With superlatives it intensifies meaning ('the one greatest'). The word serves in idiomatic expressions and can mean 'the same' when repeated. Biblical usage includes theological assertions of monotheism ('one God'), counting of groups ('one of the twelve'), and narrative enumeration.