The spelling of the word "sigler" can be explained with the International Phonetic Alphabet (IPA). The first sound is /s/ which is a voiceless alveolar fricative. This is followed by the sound /ɪ/ which is a short vowel sound often found in words like "sit" or "bit". The third sound is /g/ which is a voiced velar stop. Finally, the word ends with /l/ which is a voiced alveolar lateral approximant. The spelling of "sigler" accurately captures the phonetic sounds present in the word.