A grain of sand / (by extension, figuratively) Anything causing irritation or discomfort.

Any of many cute New World parakeets of the former genus Conurus, now reassigned to other genera in subfamily Arinae, principally Psittacara and Eupsittula.

plural of next friend

One who thatches with reeds. / A thatched frame covering blocks or tiles of dried china clay, to protect them from the rain while permitting free ventilation.