[as regards] {prep.} Regarding; concerning; about. * /You needn't worry as […]

[as to] {prep.} 1. In connection with; about; regarding. * /There […]

[aside of] {prep.}, {dialect} Beside; by the side of. * /Mary […]

[at a set time] {prep. phr.} At a particular, pre-specified time. […]

[at each other's throats] {prep. phr.} Always arguing and quarreling. * […]

[at face value] {prep. phr.} What one can actually hear, read, […]

[at great length] {prep. phr.} 1. In great detail. * /Jim […]

[at half mast] {prep. phr.} Halfway up or down; referring primarily […]

[at one's best] {prep. phr.} In best form; displaying one's best […]

[at the eleventh hour] {prep. phr.} At the last possible time. […]