Table 1 Terms used to describe medication taking.

Term	Origin	Definition*
Compliance	Latin, “complere”	To fulfil or fill up, to act in accordance with a wish or command
Adherence	Latin, “adhaerere”	To stick to, remain faithful to
Concordance	Latin, “concordia” – con‐ same + cors heart	A state or condition of agreement or harmony
Persistence	Latin, “persistere”– per‐ intensive + sistere to stand steadfast	The quality of persisting; tenacity

*See Collins Softback English Dictionary.¹⁰