mamihlapinatapai

Etymology
From a word, which The Guinness Book of Records listed as the "most succinct word," defining it as "looking at each other hoping that either will offer to do something which both parties desire but are unwilling to do."

The word is a regularly-derived form of the verb /iɬəpi/, meaning "to feel awkward" or "to be at a loss for what to do": ma[m]-  + ihlvpi + :n[a]- stative verb + -at[a]- Causative + -a:pai Dual_(grammatical_number). Its literal meaning is therefore roughly "to make each other both feel awkward".

Noun

 * 1) A situation in which all participants want something to be done, but none want to do it.