Some examples of hendiadys comprise two words in the bound state; others, two words in appositional hendiadys. It would seem that certain cases of appositional hendiadys are closely related to wordpairs (see WORD-PAIRS, BREAK-UP), though which way the development proceeded is far from certain.

a definitionless word

Do not do a large soul-search if it is the first time that you have attempted something like this, but find one or two simple things that will be easy to put right once identified.

Mrs Partridge, upon this, immediately fell into a fury, and discharged the trencher on which she was eating, at the head of poor Jenny […]