However, these solutions were rendered untenable by advances in both helioseismology, the study of how waves propagate through the sun, and improved neutrino measurements.

This "left hook" broke through the Tebaga Gap on 27 March and, combined with a fresh frontal assault, the Line was rendered untenable.

It also places a new and salutary responsibility on the churches, rendering increasingly untenable the kind of patronising censorship hitherto practised by churchmen with their congregations.

Contamination by these agents could render untenable the use of ground forces.

The start of the Korean War rendered untenable any policy that would have caused Taiwan to fall under PRC control.

On the other hand the wing beyond it had been rendered completely untenable.

Gregory popped up his head for a second to get a glimpse of them and he knew that if once the gun were allowed to come into action the club-house would very soon be rendered untenable by shell-fire.

At break of day the Boers discovered that their position had been rendered untenable and withdrew, leaving the road to Lydenburg clear to Buller.

Those who remain may find their situation rendered untenable by Croats who daily spew forth calls for revenge from radio and television stations just over the river in Osijek.

Arnold told his superiors in September 1934 "that any Depot west of the mountains might be rendered untenable by a determined adversary."