# Allow optional space [duplicate]

I believe \allowbreak should work but I can't get it to work in normal body text. Is there an alternative to allowbreak? Should I enclose my entire book text within a \texttt (which I think is necessary for allowbreak but not completely sure)?
Basically I want to know if there is something like \abc which can be introduced into something like verylongword\abcmorewords resulting in either verylongwordmorewords or verylongword morewords.
## marked as duplicate by egreg line-breaking StackExchange.ready(function() { if (StackExchange.options.isMobile) return; $('.dupe-hammer-message-hover:not(.hover-bound)').each(function() { var$hover = $(this).addClass('hover-bound'),$msg = $hover.siblings('.dupe-hammer-message');$hover.hover( function() { $hover.showInfoMessage('', { messageElement:$msg.clone().show(), transient: false, position: { my: 'bottom left', at: 'top center', offsetTop: -7 }, dismissable: false, relativeToBody: true }); }, function() { StackExchange.helpers.removeMessages(); } ); }); }); Jan 30 '17 at 9:05
• Post a MWE. \allowbreak works for my document. – bene Jan 30 '17 at 8:40
• It turns out that a space is required after an \allowbreak – hashable Feb 9 '17 at 20:55