Moreover, the countries formerly subdued by the Franks availed themselves of this opportunity to loosen the yoke; Thuringia was lost by Sigebert in 641, and the revolt of Alamannia in 643 set back the frontier of the kingdom from the Elbe to Austrasia.
Laxare, to loosen), e.g.
Absolutio from absolvo, loosen, acquit), a term used in civil and ecclesiastical law, denoting the act of setting free or acquitting.
And further, by inviting them to loosen, though not exactly to dissolve, their political allegiance - the very thing that gave them stability - it removed the foundation on which they rested.
The European operations in China consequent on the "Boxer" rising showed how distance from European criticism tends to loosen that restraint.