légyen

• IPA^(key): [ˈleːɟɛn]
• Hyphenation: lé‧gyen

From the noun légy (“fly”) +‎ -en (case suffix).

• legyen (somewhat folksy in this sense)

légyen

1. superessive singular of légy

From the shared stem of van (“to be”) and lesz (“to become; will be”) +‎ -jen.

légyen

1. Alternative form of legyen, third-person singular subjunctive present indefinite of van.
2. Alternative form of legyen, third-person singular subjunctive present indefinite of lesz.

Although this form variant is archaic, it still occurs in a concessive (subjunctive) sense (“whether he/she/it be”), especially in the past tense, mainly in the phrase lett légyen (“whether he/she/it were”) (occasionally also applied to the present) and rarely combined with other verbs (examples).