4. as if to; (as though) about to; going to; on the point of; at any minute
after an attributive form or auxiliary verb ぬ(ん), also often …とばかり(に)
今がその時ではないが仕方がない、と言わんばかりだ。It is as if to say, 'Now is not the time, but there is nothing to be done.'
6. always; constantly