A sterile stratum that lies above the stratum being investigated
The rock and subsoil that lies above a mineral deposit such as a coal seam.
To overload or overtax.
A fault or interruption in a stratum.
A difficulty, problem, condition, or action contributing to such a situation.
A malfunction.
A violent occurrence or event.
Efforts taken or expended, typically beyond the normal required.
Liability to punishment; conflict with authority.
Wife. Clipping of trouble and strife.
A distressing or dangerous situation.
In weaker sense: to bother or inconvenience.
To mentally distress; to cause (someone) to be anxious or perplexed.
To worry; to be anxious.
To take pains to do something.