köken: From Middle Persian [script needed] (tyc /tēz/, “sharp”), ultimately from Proto-Indo-European *(s)teyg-. Cognate with Manichaean Middle Persian 𐫎𐫏𐫋 (tēǰ, “sharp”), Northern Kurdish tîj, tûj (“sharp; hot, spicy”), Central Kurdish تیژ (tîj), تێژ (têj, “sharp, hot (peppery)”). Note Armenian թեժ (tʻež), an Iranian borrowing.
köken: Alteration from 如何しい (ikagashii), itself derived from 如何 (ikaga, “how; uncertainly”) + しい (-shii, adjectivizing suffix). The sound shift from /ikaɡaɕiː/ to /ikaɡawaɕiː/ was probably influenced by the medial /wa/ in roughly synonymous adjective 疑わしい (utagawashii).
köken: Borrowed from French ferme (“firm”). First attested in 1665 Cognate with English firm (adjective). For the semantic development, cf. English fast.
çekim: karşılaştırma fürgébb · üstünlük legfürgébb
köken: From an otherwise unattested front-vowel stem variant of the same word family as for(dít) + -g (frequentative verb-forming suffix) + -e (obsolete present-participle suffix). For the -e ending, compare ferde, lenge.
nice, friendly · nice, well-behaved · good (competent, talented)
çekim: karşılaştırma flinkere · üstünlük flinkest
köken: From Middle Low German flink (“bright, shining, quick”). Perhaps ultimately related to Proto-Germanic *flakurōną (“to flutter, beat repeatedly”). Cognate to Plautdietsch flinkj (“quick”).