labing-

• labin- — for compounds with next stem starting with the letter ⟨d⟩, ⟨l⟩, ⟨s⟩, or ⟨t⟩.
• labim- — for compounds with next stem starting with the letter ⟨b⟩ or ⟨p⟩.

From labi (“excess”) +‎ -ng- (compound enclitic interfix). labing-isa would literally mean 1 excess from 10, with 10 implied.

• (Standard Tagalog) IPA^(key): /laˈbiŋ/ [lɐˈbɪŋ]
• Syllabification: la‧bing-

labíng- (Baybayin spelling ᜎᜊᜒᜅ᜔)

1. Cardinal prefix, denoting excess over the count of ten, if the next stem in the compound starts with a vowel or ⟨w⟩.

   ‎labing- + ‎isa (“one”) → ‎labing-isa (“eleven”)

   ‎labing- + ‎apat (“four”) → ‎labing-apat (“fourteen”)

   ‎labing- + ‎anim (“six”) → ‎labing-anim (“sixteen”)

   ‎labing- + ‎walo (“eight”) → ‎labingwalo (“eighteen”)

• Tagalog terms prefixed with labing-

  labing-anim

  labing-apat

  labing-isa

  labingwalo

• libang, bilang, baling, langib