The transcription /θɪŋk/ represents the word "think."
/θ/ → Voiceless dental fricative (as in "thin")
/ɪ/ → Short lax vowel (as in "bit")
/ŋ/ → Voiced velar nasal (as in "sing")
/k/ → Voiceless velar plosive (as in "kick")
Thus, /θɪŋk/ corresponds to "think."