[under one's thumb] or [under the thumb] {adj.} or {adv. phr.} […]

[under one's wing] {adv. phr.} Under the care or protection of. […]

[under orders] {adv. phr.} Not out of one's own desire or […]

[under protest] {adv. phr.} Against one's wish; unwillingly. * /"I'll go […]

[under the circumstances] also [in the circumstances] {adv. phr.} In the […]

[under the counter] {adv. phr.}, {informal} Secretly (bought or sold). * […]

[under the hammer] {adv. phr.} Up for sale at auction. * […]

[under the sun] {adj.} or {adv. phr.} On earth; in the […]

[under the weather] {adv. phr.} In bad health or low spirits. […]

[under the wire] {adv. phr.} With a narrow time limit; in […]