隻句 is read as せっく (sekku) and means a few words.
せっく
sekku
いちごんせきく
every single word and phrase
へんげんせきく
few words
あげく
last line (of a renga)
もんく
complaint
はいく
haiku
く
phrase
ぜく
jueju (Chinese quatrain with lines of either five or seven syllables)
かんようく
idiom
きんく
taboo word
seasonal festival
ごく
words
びじれいく
flowery words