Hi @Sachithananda 1 ,

if you want to customize it 

there is a OOB script include named "KBKnowledgeKeyword"

update the script include as below 

if it's already updated in your instance just update the methods as highlighted 

KBKnowledgeKeyword = Class.create();

KBKnowledgeKeyword.prototype = Object.extendsObject(KBKnowledgeKeywordSNC, {

    /**
     * If the user is a owner/ manager of the KB or knowledge_admin 
     * they should be able to create kb_knowledge_keyword record
     *
     * @param GlideRecord: knowledgeKeywordGr
     * @return Boolean: can logged in user pin an article
     */
    canCreate: function(glideRecord) {

        if (gs.hasRole("knowledge_admin"))
            return true;
        if (glideRecord.getRecordClassName() === "kb_knowledge_keyword" && gs.hasRole('knowledge_manager')) {
            return true;
        }
        //check can create for table list view and for new record from kb_knowledge_keyword
        if (glideRecord === null || typeof glideRecord === "undefined" || glideRecord.getRecordClassName() === "kb_knowledge_keyword") {
            return new KBKnowledgeBase().isManagerOfAny(gs.getUserID());
        }

        //check can create for related list view on kb_knowledge_keyword record
        var className = glideRecord.getRecordClassName();
        if (className == "kb_knowledge" || className.startsWith('kb_template') || className.startsWith('u_kb_template')) {
            var kbKnowledgeKeyword = new GlideRecord("kb_knowledge_keyword");
            if (kbKnowledgeKeyword.get("knowledge", glideRecord.sys_id))
                return false;

            return this.isKnowledgeBaseOwner(glideRecord, this.PATH_TO_OWNER_FROM_KNOWLEDGE) || this.isKnowledgeBaseManager(glideRecord, this.PATH_TO_MANAGERS_FROM_KNOWLEDGE);
        }

        //check can create for related list view on kb_knowledge_base record
        if (glideRecord.getRecordClassName() == "kb_knowledge_base") {
            return this.isKnowledgeBaseOwner(glideRecord, this.PATH_TO_OWNER_FROM_KB) || this.isKnowledgeBaseManager(glideRecord, this.PATH_TO_MANAGERS_FROM_KB) || gs.hasRole('knowledge_manager');
        }

        return false;
    },
    /**
     * If the user is knowledge_admin or owner/ manager of the KB
     * they should be able to write
     *
     * @param GlideRecord: knowledgeKeywordGr
     * @return Boolean: can logged in user read the record
     */
    canWrite: function(knowledgeKeywordGr) {
        if (gs.hasRole("knowledge_admin") || gs.hasRole('knowledge_manager'))
            return true;

        if (knowledgeKeywordGr.isNewRecord())
            return this.canCreate(knowledgeKeywordGr);

        return (this.isKnowledgeBaseOwner(knowledgeKeywordGr, this.PATH_TO_OWNER) ||
            this.isKnowledgeBaseManager(knowledgeKeywordGr, this.PATH_TO_MANAGERS) || gs.hasRole('knowledge_manager'));
    },

    type: "KBKnowledgeKeyword"
});

additional step 

if the record (kb_knowledge_keyword)is not editable 

create a DenyUnless ACL like this

and you can ignore the last ACLs that you have created 

Please mark my answer as helpful/correct if it resolves your query.

Regards,
Chaitanya