Literally: want – not – get – suffering
Alternately: The pain that comes from not getting what you want. This is the seventh of the “eight sufferings” of 四苦八苦.
Notes: Despite being part of the same set as our previous “suffering” entries, this one appears in fewer dictionaries and seems more obscure in general. This one (also) comes to us from the Mahāyāna Mahāparinirvāṇa Sūtra, a.k.a. the Nirvana Sutra, Japanese 『大般涅槃経』= Daihatsunehangyou.