inseparable /in-sepˈə-rə-bl/

1. Incapable of being separated
2. (of eg friends or siblings) unwilling to be separated
3. (of a prefix) not existing as a separate word (grammar)

(usu used in pl) an inseparable companion

• on the pull
• on the q.t.
• on the QT
• on the quiet
• on the rack
• on the rag
• on the rampage
• on the razzle
• on the rebound
• on the right tack
• on the right track
• on the rise
• on the road
• on the rocks
• on the ropes
• on the run
• on the safe side
• on the same wavelength as
• on the scale of
• on the shady side of
• on the shelf
• on the shop floor
• on the short side
• on the side
• on the side of the angels