Explanation
Expresses 'whether... or...', 'both... and...', 'in either case'.
Formation
Phrase A (dictionary/adjective form) + につけ、Phrase B (dictionary/adjective form) + につけ
Detailed explanation
The ～AにつけBにつけ pattern is used to show that some state or action applies in both situation A and situation B. It often pairs contrasting or related conditions and can be translated as 'whether A or B', 'in either case', etc.
Examples
Kare ni wa warau ni tsuke naku ni tsuke, totemo miryokuteki da.
He is very charming whether he’s laughing or crying.
Ureshii ni tsuke kanashii ni tsuke, kare wa itsumo ongaku o kiite iru.
Whether he's happy or sad, he's always listening to music.
Nitchuu ni tsuke yakan ni tsuke, kono keishiki wa utsukushii.
This view is beautiful whether it's daytime or nighttime.
Yorokobi ni tsuke kanashimi ni tsuke, kanojo wa itsumo watashi o sasaete kureru.
Whether I’m joyful or sorrowful, she always supports me.
Practice
Grammar content sourced from hanabira.org.