Adverb
(parenthesis) Used to make a statement less offensive. (Can we add an example for this sense?)
Your son's behaviour at school has been, shall we say, "difficult".
(parenthesis) Used as a warning that the description may be imprecise.
Synonym: shall I say
Used other than figuratively or idiomatically: see shall, we, say.
Source: en.wiktionary.orgWell, his attention span was not long, shall we say. Lauren Bacall
Having a period of - well, austerity, shall we say - certainly humbles you. Zaha Hadid
Ah, what shall we say then, but that earth threatened often Shall live on for ever that such things may be, That the dry seed shall quicken, the hard earth shall soften, And the spring-bearing birds flutter north o'er the sea, That earth's garden may bloom round my love's feet and me? William Morris
When shall we say two forces are equal? Henri Poincaré
What shall we say of the Intelligence that plans all this? Can the Creator be less than the creature? Shall we not say that Intelligence is indestructible, and its measure is its Power to adapt means to ends? Intelligence, Matter, Energy - nature's trinity in her manifestations. Elisha Gray