Sirbi (Sirp)

Sickle. Where we say ‘hammer and sickle’, they say sirp ja vasar (see Vasara).

Sireli (Sirel)

Lilac, Syringa spp.

Sirge (Sirge)

Perpendicular, straight, upright, erect. Confusingly, the genitive is identical to the nominative but, like its peers Nurklik and Otse, it is an adjective that describes the street. A geometrical street-name group. See Joone.

Sirptiiva (Sirptiib)

Hook-tip moth, five species known in Estonia:

• Hambune-sirptiib, scalloped hook-tip, Falcaria lacertinaria
• Kase-sirptiib, pebble hook-tip, Drepana falcataria
• Laik-sirptiib, scarce hook-tip, Sabra harpagula
• Pruun-sirptiib, dusky hook-tip, D. curvatula
• Tähnik-sirptiib, oak hook-tip, Watsonalla binaria

Part of a lepidopteran group. See also Suru.

Sisaski (Sisask)

Another of the numerous names for nightingale, this one tending to belong more to the eastern half of the country. And the more it flies, the more it changes its name, see Ööbiku. Known as Poltava (town in Ukraine) until 1925 when it morphed into Ööbiku or its alternative Ööpiku, with an interlude (1940-41) as Põdra, before realizing the name already existed and switched to its synonym in 1958 to avoid duplication.