Onsets

Some articles on onset, onsets:

Spanish Phonology - Phonotactics
... consists of an optional syllable onset, consisting of one or two consonants an obligatory syllable nucleus, consisting of a vowel optionally preceded by and/or ... The following restrictions apply Onset First consonant (C1) Can be any consonant, including a liquid (/l, r/) ... Although the onsets /tl/ and /dl/ do occur, they are not native to Spanish ...
Taos Phonology - Prosody - Syllables and Phonotactics - Onsets
... A single onset C1 can be filled by any Taos consonant (except the borrowed /f/) — that is, /p, pʼ, pʰ, b, m, w, t, tʼ, tʰ, d, n, l, ɬ, tʃ, tʃʼ, s, ɾ, j, k, kʼ, kʷ, k ... The onset /ɾ/, and the onsets /b, d, ɡ/ word-initially, are only found in Spanish borrowings ...
Tibetan Pinyin - Single Syllable Orthography - Onsets
... Below is a comprehensive transcription table of onsets of an initial syllable of a word ... transcribe is not the first syllable of a word, see #Onset variation ...
English Phonology - Phonotactics - Syllable Structure - Onset
... The following can occur as the onset All single consonant phonemes except /ŋ/ Stop plus approximant other than /j/ /pl/, /bl/, /kl/, /ɡl/, /pr/, /br/, /tr/, /dr/, /kr/, /ɡr/, /tw/, /dw/, /ɡw/, /kw/, /pw ... However, the onsets /sf/, /sfr/, /skl/, /sθ/, and /θl/ have remained intact ... The onset /hw/ is simplified to /w/ in many dialects (wine–whine merger) ...
Syllable Rime - Structure - Onset
... Most syllables have an onset ... Some languages restrict onsets to be only a single consonant, while others allow multiconsonant onsets according to various rules ... For example, in English, onsets such as pr-, pl- and tr- are possible but tl- is not, and sk- is possible but ks- is not ...