ご無沙汰
gobusata
not writing or contacting for a while
Example sentences
ご無沙汰をして、ごめんなさい。
I am sorry I did not write to you for such a long time.
ご無沙汰はお互いさまです。
I am as much in the wrong as you are about not writing before this.
あんまりご無沙汰してしまって、どうも敷居が高くなってしまいました。
I have neglected you so long that I feel a bit shy in visiting you.