(なが)らく

ながらく
adverb
for a long time; for many years
1. for a long time; for a long while; for many years
An adverb indicating that something has continued for a long period. Slightly formal and polite in tone, often used when acknowledging someone's patience or long-standing relationship.
(なが)らくお()たせしました。
Thank you for waiting so long. (Sorry to have kept you waiting.)
(なが)らくご愛顧(あいこ)いただき、ありがとうございます。
Thank you for your long patronage.
(なが)らく営業(えいぎょう)してまいりましたが、今月(こんげつ)(まつ)をもちまして閉店(へいてん)いたします。
We have been in business for a long time, but we will be closing at the end of this month.

USAGE:
(なが)らく is a formal, polite adverb often used in set phrases expressing gratitude or apology for something that has lasted a long time. It is very common in customer service, business, and ceremonial language.

COMMON COLLOCATIONS:

  • (なが)らくお()たせしました (sorry to have kept you waiting)
  • (なが)らくご愛顧(あいこ)いただき (thank you for your long patronage)
  • (なが)らくお世話(せわ)になりました (thank you for your support over the years)

SIMILAR WORDS:

  • (なが)らく: for a long time (formal, polite)
  • (なが)(あいだ): for a long time (neutral, everyday)
  • ずっと: all along, the whole time (casual, emphasizes continuity)